Uni- Fit R
Thru-the-Wall Series
Service and Parts
Manual
Thru-the-Wall Series
230 Volts UE10C33 UE12C33
115 Volts UE08C13
Unifit Heat Cool Svc Parts 2010 (05/10)
Unifit. Cool (03/07)
Air Conditioner Service Manual
TABLE OF CONTENTS
Safety Precautions ..........................................................................................................................................
3
Operating Instructions ..................................................................................................................................7
Controls.................................................................................................................................................... 7
Remote control......................................................................................................................................... 8
Disassembly instructions ............................................................................................................................. 9
Mechanical Parts...................................................................................................................................... 9
Air Handling Parts ...................................................................................................................................10
Electrical Parts ........................................................................................................................................11
Refrigeration Cycle..................................................................................................................................13
Schematic Diagram........................................................................................................................................16
Wiring Diagram........................................................................................................................................16
Troubleshooting Guide ................................................................................................................................17
Piping System .........................................................................................................................................17
Troubleshooting Guide ............................................................................................................................18
Room Air Conditioner Voltage Limits.......................................................................................................21
Product specifications....................................................................................................................................23~25
Exploded Vi ew .............................................................................................................................................26
Replacement Parts List ...............................................................................................................................27~29
2 Room Air Conditioner
Safety Precautions
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must
be followed.
I Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is
classified by the following indications.
This symbol indicates the possibility of death or serious injury.
WARNING
CAUTION This symbol indicates the possibility of injury or damage to property only.
I Meanings of symbols used in this manual are as shown below.
Be sure not to do.
Be sure to follow the instruction.
WARNING
I Installation
Don’t use a power cord, a plug
or a loose socket which is dam-
aged.
Always plug into a grounded
outlet.
Do not modify or extend the
power cord length.
• Otherwise, it may cause a fire or
electrical shock.
• Otherwise, it may cause a fire or
electrical shock.
• It will cause electric shock or fire
due to heat generation.
Coo
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l
Sa
r
gy
er
an
F
He
at
F
2
H
O
IG
H
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Tim
T
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er
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TEM
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e
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y
IMER
P
er
n
SPFAN
EE
He
D
at
F1
P
O
F
2
H
O
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W
R
Tim
IGH
MO
er
DE
TE
'
F
TIM
M
ER
P
D
SPF
A
N
EE
PO
W
ER
Do not disassemble or modify
products.
Be caution when unpacking and
installing.
Do not use the power cord near flam-
mable gas or combustibles such as
gasoline, benzene, thinner, etc.
• It may cause failure and electric
shock.
• Sharp edges may cause injury.
• It may cause explosion or fire.
Coo
Ene
l
Sa
r
gy
er
an
F
Hea
t
F1 LO
W
Timer
TIM
2
HIG
H
MO
DE
TEMP
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F
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S
P
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Co
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Sa
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an
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at
L
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F2
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Tim
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MO
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TIM
TEMP
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Timer
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TEMP
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Gasolin
Service Manual 3
Safety Precautions
I Operation
Do not place heavy object on the
power cord and take care so that
the cord should not be pressed.
Do not share the outlet with
other appliances.
Take the power plug out if neces-
sary, holding the head of the plug
and do not touch it with wet hands.
• There is danger of fire or electric
shock.
• It will cause electric shock or fire
due to heat generation.
• Otherwise, it may cause a fire or
electrical shock.
Coo
Ene
l
Sa
r
gy
er
an
F
Hea
t
F
2
L
O
Timer
TIM
HIG
H
W
MO
DE
'
F
TEMP
ER
Coo
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SPF
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er
an
F
PO
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He
at
F
2
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Tim
GH
MO
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DE
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F
TIM
ER
TEMP
SPF
A
NE
E
D
PO
WE
R
Do not place the power cord
near a heater.
Do not allow water to run into
electric parts.
Use a soft cloth to clean. Do not
use wax, thinner, or a strong
detergent.
• The appearance of the air condi-
tioner may deteriorate, change
color, or develop surface flaws.
• It may cause fire and electric
shock.
• It will cause failure of machine or
electric shock.
Co
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n
e
o
l
Sa
r
gy
er
Fan
He
at
F1
F
2
H
O
I
Tim
GH
MO
er
DE
TIM
ER
TEM
'
F
P
SPF
A
NE
E
D
PO
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Coo
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Sa
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gy
er
F
a
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Hea
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F1 LO
W
2
HIG
H
MODE
Timer
TIM
TEMP
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S
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F
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1
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2
HIG
H
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Tim
er
MO
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TIM
ER
TEMP
SPF
A
NE
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D
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R
x
Thinner
Wa
Unplug the unit if strange
sounds, odors, or smoke come
from it.
Do not open the suction inlet
grill of the product during opera-
tion.
If water enters the product, turn off the the
power switch of the main body of appliance.
Contact service center after taking the
power-plug out from the socket.
• Otherwise, it may electrical
shock and failure.
• Otherwise it may cause fire and
electric shock accident.
Co
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n
e
o
l
Sa
r
gy
er
an
He
at
F1
F
2
H
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I
Tim
er
GH
MO
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TIM
ER
TEM
'
F
P
SPF
A
NE
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D
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Co
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o
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Sa
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an
Hea
F
t
F
1
L
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2
HIG
H
W
Tim
er
MO
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TIM
TEMP
ER
SPF
A
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D
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Coo
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l
Sa
r
gy
er
F
an
Heat
F
1
L
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Timer
TIM
HIG
H
W
MO
DE
TEMP
'
ER
S
P
A
N
EE
D
PO
WE
R
Ventilate the room well when
using this appliance together
with a stove, etc.
Turn off the power and breaker
firstly when cleansing the unit.
Turn off the main power switch
when not using it for a long
time.
• An oxygen shortage may occur.
• Since the fan rotates at high speed • Prevent accidental startup and the
during operation, it may cause
injury.
possibility of injury.
Coo
Ene
l
S
a
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g
e
y
F
r
an
Hea
t
F
1
L
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Timer
TIM
HIGH
MO
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TM
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SPF
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O
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Coo
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Sa
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F
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F
1
L
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Timer
TIM
HIG
H
W
MO
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TEMP
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S
P
A
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PO
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Cool
Ene
Sa
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gy
er
an
v
F
Hea
t
F
1
L
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Timer
TIM
HIG
H
W
MO
DE
TEMP
'
F
ER
SPF
A
N
ED
PO
WE
R
4 Room Air Conditioner
Safety Precautions
Do not operate or stop the unit
by inserting or pulling out the
power plug.
Do not damage or use an
unspecified power cord.
Do not operate with wet hands
or in damp environment.
• It will cause electric shock or fire
due to heat generation.
• It will cause electric shock or fire.
• It will cause electric shock.
Co
E
n
e
o
l
Sa
r
gy
er
Fan
He
at
F1
L
O
GH
F2
I
W
Tim
er
MO
DE
'
F
TIM
ER
TEM
P
SPFAN
EE
D
PO
WE
R
Co
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n
e
o
l
Sa
r
gy
er
Fan
He
at
F1
L
F2
O
W
Tim
er
MO
DE
TEM
'
F
TIM
ER
P
SPF
A
NE
E
D
PO
WE
R
Hold the plug by the head when
taking it out.
When gas leaks, open the win-
dow for ventilation before oper-
ating the unit.
Never touch the metal parts of
the unit when removing the fil-
ter.
• It may cause electric shock and
damage.
• Otherwise, it may cause explo-
sion, and a fire.
• They are sharp and may cause
injury.
Co
E
n
e
o
l
Sa
r
gy
er
an
Hea
F
t
F
1
L
O
2
HIG
H
W
Tim
MO
er
DE
'
F
TIM
TEMP
ER
SPF
A
NE
E
D
PO
WE
R
Co
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o
l
Sa
r
gy
er
Fan
He
at
F
2
L
O
W
Tim
er
MO
DE
TEM
'
TIM
ER
P
SPF
A
NE
E
D
PO
WE
R
CAUTION
I Installation
Install the product so that the noise or hot wind
from the outdoor unit may not cause any damage
to the neighbors.
Keep level parallel in installing the product.
• Otherwise, it may cause dispute with the neighbors.
• Otherwise, it may cause vibration or water leakage.
Co
E
n
e
o
l
Sa
r
gy
er
Fan
He
F1
at
F
2
L
O
IGH
W
Tim
er
MO
'
F
DE
TE
TIM
MP
ER
F
A
SP
N
D
EE
PO
WE
R
Service Manual 5
Safety Precautions
I Operation
Do not put a pet or house plant
where it will be exposed to
direct air flow.
Do not block the inlet or outlet
of air flow.
Use a soft cloth to clean. Do not
use wax, thinner, or a strong
detergent.
• It may cause injury.
• It may cause product failure.
• The appearance of the air condi-
tioner may deteriorate, change
color, or develop surface flaws.
Co
E
n
e
o
l
Sa
r
gy
er
Fan
He
a
F1
F
2
H
O
I
Tim
er
GH
O
E
TEM
T
ER
P
PF
D
P
E
Co
E
n
e
o
l
Sa
r
gy
er
Fan
He
at
F
2
H
O
I
W
Tim
er
GH
MO
DE
TEM
P
'
F
TIM
ER
Co
S
PE
FA
N
ED
E
n
e
o
l
Sa
r
gy
er
Fan
PO
W
ER
He
at
F1
L
H
O
W
Tim
er
MO
DE
TEM
P
'
F
TIM
ER
SPF
A
N
ED
PO
WE
R
Do not step on the indoor/out-
door unit and do not put any-
thing on it.
Always insert the filter securely.
Clean it every two weeks.
Do not drink water drained from
air conditioner.
• It contains containments and will
make you sick.
• It may cause an injury through
dropping of the unit or falling
down.
• Operation without filters will cause
failure.
Co
E
n
e
o
l
Sa
r
gy
er
Fan
He
at
F1
L
F2
O
W
Tim
er
MO
DE
TEM
'
F
TIM
ER
P
SPF
A
NE
E
D
PO
WE
R
Be cautious not to touch the
sharp edges when installing.
Avoid excessive cooling and
perform ventilation sometimes.
Do not insert the hands or bars
through the air inlet or outlet
during operation.
• It may cause injury.
• Otherwise, it may do harm to
your health.
• Otherwise, it may cause person-
al injury.
Co
E
n
e
o
l
Sa
r
gy
er
Fan
He
at
F
2
L
O
W
Tim
er
MO
DE
Co
o
l
TEM
'
F
E
n
e
rgy
TIM
ER
S
P
F
SPF
A
NE
H
E
eat
F
D
HIG
H
W
PO
WE
M
Time
TIM
OD
r
R
E
'
F
TEM
ER
P
SPF
A
NE
E
D
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WE
R
Co
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S
e
r
g
y
v
e
r
n
He
at
F1
F
2
H
O
W
Tim
er
IGH
MO
DE
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F
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TIM
M
ER
P
F
A
SP
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6 Room Air Conditioner
Operating Instructions
Controls
FAN SPEED
Every time you push this button,it advances the setting as follows:{High[F2] Low[F1]} High[F2]
REMOTE CONTROL SIGNAL
RECEIVER
TEMPERATURE SETTING
Use this button to automatically control the
temperature of the room
The tmeperature can be set within a range of
。
。
。
60 F to 86 F by increments of 1 F.
The setting appears in the display.
POWER
To turn the air conditioner ON,push this button.
To turn the air conditioner OFF,push the button
again.
TIMER
SHUT-OFF TIME
This button takes priority over any other button.
You will usually use shut-off time while you sleep.
If unit is running,use Timer to set number of hours until shut-off.
For your sleeping comfort，once Timer is set，the Temperature
。
setting will raise 2 F after 30 min，and once again after another
30 min.
Push Timer button to advance setting from 1Hour→
→12Hours maximum.
2Hour →...
START TIME
If unit is off,use Timer to set number of hours before nuit starts.
Push Timer button to advance setting from 1Hour→
→12Hours maximum.
2Hour →...
MODE
Push this button to shift mode of operation from COOL → MONEY SAVER→ FAN ONLY→HEAT
COOL:
Fan runs continually for normal cooling operation.
MONEY SAVER:
The fan stops when the compressor stops cooling.Approximately every 3 minutes the fan will turn on and the nuit will
check the room air temperature to determine if cooling is needed.
FAN ONLY:
Fan-only operation.
HEAT:
Fan runs continually for normal heating operation.
AUTO RESTART
When power is restored after an electrical power failure,the unit will begin to run at its last setting.
7 Room Air Conditioner
REMOTE CONTROL
POWER
To turn the air conditioner ON,push this button.
To turn the air conditioner OFF,push the button again.
This button takes priority over any other button.
TEMPERATURE SETTING
Use this button to automatically control the temperature of the room.
。
。
The tmeperature can be set within a range of
increments of 1 F.
60 F to 86 F by
。
The setting appears in the display.
FAN SPEED
Every time you push this button,it advances the setting as follows:
Low[F1]} High[F2]
{High[F2]
TIMER
SHUT-OFF TIME
You will usually use shut-off time while you sleep.
If unit is running,use Timer to set number of hours until shut-off.
setting will
For your sleeping comfort，once Timer is set，the Temperature
。
raise 2 F after 30 min，and once again after another
30 min.
Push Timer button to advance setting from 1Hour→
→12Hours maximum.
2Hour →...
START TIME
If unit is off,use Timer to set number of hours before nuit starts.
Push Timer button to advance setting from 1Hour→
→12Hours maximum.
2Hour →...
MODE
Push this button to shift mode of operation from COOL → MONEY SAVER→ FAN ONLY→HEAT
COOL:
Fan runs continually for normal cooling operation.
MONEY SAVER:
The fan stops when the compressor stops cooling.Approximately every 3 minutes the fan will turn on and the nuit will
check the room air temperature to determine if cooling is needed.
FAN ONLY:
Fan-only operation.
HEAT:
Fan runs continually for normal heating operation.
CAUTION
A slight heat odor may come from the nuit
When the air conditioner has been performed its
when first switching to HEAT after the
cooling or feating operation and is turned off or
cooling season is over.This odor,caused
set to the fan position，wait at 3 minutes
by fine duct particles on the heater,will
before resetting to the cooling operation again.
disappear quickly.This is harmless.
Service Manual 8
Disassembly Instructions
Disassembly Instructions
— Before the following disassembly, POWER SWITCH is set to OFF and disconnected the power cord.
Mechanical Parts
1. FRONT GRILLE
1. Open the inlet grille upward or downward.
'
F
LO
G
H
W
F1 HI
F2
ol
P
EM
Co
r
T
ER
gy
W
E
ne er
S
av
PO
e
r
an
Tim
N
A
D
F
F
EE
SP
t
H
ea
TIMER
DE
MO
2. Remove the screw which fastens the front grille.
3. Pull the front grille from the right side.
4. Remove the front grille. (See Fig. 1)
5. Re-install the component by referring to the
removal procedure.
Cool
F
1
L
O
W
'
F
F
2
H
I
G
H
Energy
Saver
Fan
TEMP
Heat
Timer
F
AN
MODE
TIMER
POWER
SPEED
FIG. 1
2. CABINET
1. After disassembling the FRONT GRILLE, remove the 9
screws which fasten the cabinet at the both sides and the
top. (See Fig. 2)
C
o
o
l
E
S
ne
rg
y
av
er
Keep these for later use.
F
an
F1
F2
LO
W
ME
F3
D
HI
GH
T
'
im
F
er
M
O
T
D
E
E
M
P
T
IM
E
R
F
A
S
N
PEED
P
O
W
E
R
3. CONTROL BOX
FIG. 2
1. Remove the front grille. (Refer to section 1)
2. Remove the screw which fasten the control
box. (See Fig. 3)
3. Pull the control box from the barrier.(See Fig.3)
4. Discharge the capacitor by placing a 20,000 ohm resistor
across the capacitor terminals.
Cool
Ener
gy
Sa
ver
Fa
n
F1
F2
LO
W
M
F3
E
D
H
IG
H
Timer
IM
'
F
M
O
T
D
E
E
M
P
T
E
R
F
A
N
S
P
E
E
D
P
O
W
E
R
5. Disconnect two wire housings in the control box.
6. Pull the control box forward completely.
7. Re-install the components by referring to the removal
procedure. (See Fig. 3)
(Refer to the circuit diagram found on pages 24 in this
manual and on the control box.)
FIG. 3
Service Manual 9
Disassembly Instructions
Air Handling Parts
4. ORIFICE, HEATER ASSY AND TURBO FAN
1. Remove the front grille. (Refer to section 1)
2. Remove the cabinet. (Refer to section 2)
3. Remove the 2 screws which fasten the evaporator
at the left side and the right side.
(See Fig. 4)
C
e
o
o
l
E
S
n
a
rg
e
y
r
v
F
a
n
F1
F2
LO
W
M
F
3
E
D
HI
GH
T
'
im
F
e
r
MODE
T
E
M
P
TI
MER
F
A
S
N
P
E
E
D
P
O
W
E
R
4. Move the evaporator sideward carefully.
5. Remove the 2 terminals carefully
(See Fig. 28, at Electric Heater Model only)
FIG. 4
6. Remove the 4 screws which fasten the orifice. (See
Fig. 5)
7. Remove the orifice. (See Fig. 5)
FIG. 5
8. Remove the clamp which secures the turbo fan with
plier. (See Fig. 6)
FIG. 6
9. Remove the turbo fan with plier or your hand with-
out touching blades. (See Fig. 7)
10. Re-install the components by referring to the
removal procedure, above.
5. FAN
FIG. 7
1. Remove the cabinet. (Refer to section 2)
2. Remove the brace and shroud cover.
(Refer to section 4)
3. Remove the 6 screws which fasten the condenser.
4. Move the condenser sideways carefully.
5. Remove the clamp which secures the fan.
6. Remove the fan. (See Fig. 8)
7. Re-install the components by referring to the removal
procedure, above.
FIG. 8
10 Room Air Conditioner
Disassembly Instructions
6. SHROUD
1. Remove the fan. (Refer to section 5)
2. Remove the screw which fasten the shroud.
3. Remove the shroud. (See Fig. 9)
4. Re-install the component by referring to the
removal procedure, above.
FIG. 9
Electrical Parts
7. MOTOR
1. Remove the cabinet. (Refer to section 2)
2. Remove the clamp cord and disconnect a wire
housing in control box. (Refer to section 3)
3. Remove the turbo fan. (Refer to section 5)
4. Remove the fan. (Refer to section 5)
5. Remove the 4 or 2 screws which fasten the motor.
(See Fig. 10)
6. Remove the motor.
7. Re-install the components by referring to the
removal procedure, above.
FIG. 10
8. COMPRESSOR
1. Remove the cabinet. (Refer to section 2)
2. Discharge the refrigerant system using FreonTM
Recovery System.
If there is no valve to attach the recovery system,
install one (such as a WATCO A-1) before venting
the FreonTM . Leave the valve in place after
servicing the system.
3. Disconnect the 3 leads from the compressor.
4. After purging the unit completely, unbraze the suc-
tion and discharge tubes at the compressor con-
nections.
FIG. 11
5. Remove the 3 nuts and the 3 washers which fas-
ten the compressor. (See Fig. 11)
6. Remove the compressor.
7. Re-instill the components by referring to the
removal procedure, above.
9. CAPACITOR
Cool
Ener
gy
Sa
ver
Fa
n
F1 LO
F2
M
W
H
F
ED
3
HIG
Timer
'
F
1. Remove the control box. (Refer to section 3)
2. Remove a screw which fasten the display panel.
3. Remove 2 screws and unfold the control box.
(See Fig. 12)
MODE
TEM
P
TIMER
FA
N
SPEED
PO
WER
4. Remove the screw and the clamp which fastens
the capacitor. (See Fig. 12)
5. Disconnect all the leads of capacitor terminals.
6. Re-install the components by referring to the
removal procedure, above.
FIG. 12
Service Manual 11
Disassembly Instructions
10. POWER CORD
1. Remove the control box. (Refer to section 3)
2. Unfold the control box. (Refer to section 9)
3. Disconnect the grounding screw from the control
box.
4. Disconnect 2 receptacles.
5. Remove a screw which fastens the clip cord.
6. Pull the power cord. (See Fig. 13)
Cool
Ener
gy
Sa
ver
Fa
n
F
1
L
O
ED
F
W
2
M
F
3
H
IG
H
Timer
'
F
MODE
TEMP
7. Re-install the component by referring to the
removal procedure, above.
TIMER
FA
N
SPEED
PO
WER
(Use only one ground-marked hole
connection.)
for ground
8. If the supply cord of this appliance is damaged, it
must be replaced by the special cord.
(The special cord means the cord which has the
same specification marked on the supply cord fit-
ted to the unit.)
FIG. 13
11. THERMOSTAT
1. Remove the control box. (Refer to section 3)
2. Unfold the control box. (Refer to section 9)
Cool
Ener
Sa
gy
ver
Fa
n
F
1
L
O
W
E
D
H
F
2
M
F
3
3. Disconnect the theristor terminals from main
P.W.B assembly.
H
IG
Timer
'
F
MODE
TEMP
FA
N
SPEED
PO
WER
4. Remove the thermostat. (See Fig. 14)
5. Re-install the components by referring to the
removal procedure, above.
FIG. 14
12 Room Air Conditioner
Disassembly Instructions
Refrigerating Cycle
CAUTION
TM
Discharge the refrigerant system using Freon
Recovery System.
If there is no valve to attach the recovery system,
install one (such as a WATCO A-1) before vent-
TM
ing the Freon . Leave the valve in place after
servicing the system.
12. CONDENSER
1. Remove the cabinet. (Refer to section 2)
2. Remove the brace and the shroud cover.
(Refer to section 4)
3. Remove the 5 screws which fasten the condenser.
4. After discharging the refrigerant completely,
unbraze the interconnecting tube at the condenser
connections.
FIG. 15
5. Remove the condenser.
6. Re-install the components by referring to notes.
(See Fig. 15)
13. EVAPORATOR
1. Remove the cabinet. (Refer to section 2)
2. Discharge the refrigerant completely.
3. Remove the 2 screws which fasten the evaporator
at the left side and the right side.
Cool
Ener
gy
Sa
ver
Fa
n
F1
L
F
2
M
O
W
F3 ED
HIG
H
Timer
IM
'
F
M
O
T
D
E
E
M
P
T
E
R
F
A
S
N
P
E
E
D
P
O
W
E
R
4. Move the evaporator sideward carefully and then
unbraze the interconnecting tube at the evaporator
connectors.
5. Remove the evaporator.
6. Re-install the components by referring to notes.
(See Fig. 16)
FIG. 16
14. CAPILLARY TUBE
1. Remove the cabinet. (Refer to section 2)
2. After discharging the refrigerant completely,
unbraze the interconnecting tube at the capillary
tube.
3. Remove the capillary tube.
4. Re-install the components by referring to notes.
Service Manual 13
Disassembly Instructions
NOTICE
— Replacement of the refrigeration cycle.
6. Recharge as follows :
1. When replacing the refrigeration cycle, be sure to
discharge the refrigerant system using a FreonTM
recovery System.
1) Refrigeration cycle systems are charged from the
High-side. If the total charge cannot be put
in the High-side, the balance will be put in the
suction line through the access valve which you
installed as the system was opened.
2) Connect the charging cylinder as shown in Fig. 17B.
With valve C open, discharge the hose at the man-
ifold connection.
3) Open valve A and allow the proper charge to
enter the system. Valve B is still closed.
4) If more charge is required, the high-side will not
take it. Close valve A.
5) With the unit running, open valve B and add the
balance of the charge.
If there is no valve to attach the recovery system,
install one (such as a WATCO A-1) before venting
the FreonTM. Leave the valve in place after
servicing the system.
2. After discharging the unit completely, remove the
desired component, and unbrace the pinch-off
tubes.
3. Solder service valves into the pinch-off tube ports,
leaving the valves open.
4. Solder the pinch-off tubes with Service valves.
5. Evacuate as follows.
1) Connect the vacuum pump, as illustrated Fig.
17A.
2) Start the vacuum pump, slowly open manifold
valves A and B with two full turns counterclock-
wise and leave the valves closed.
a. Do not add the liquid refrigerant to the Low-
side.
b. Watch the Low-side gauge; allow pressure to
rise to 39 lbs.
c. Turn off valve B and allow pressure to drop.
d. Repeat steps B and C until the balance of the
charge is in the system.
The vacuum pump is now pulling through valves
A and B up to valve C by means of the manifold
and entire system.
6) When satisfied the unit is operating correctly,
use the pinch-off tool with the unit still running
and clamp on to the pinch-off tube. Using a tube
cutter, cut the pinch-off tube about 2 inches from
the pinch-off tool. Use sil-fos solder and solder
pinch-off tube closed. Turn off the unit, allow it to
set for a while, and then test the leakage of the
pinch-off connection.
CAUTION
If high vacuum equipment is used, just crack
valves A and B for a few minutes, then open
slowly with the two full turns counterclockwise.
This will keep oil from foaming and being
drawn into the vacuum pump.
3) Operate the vacuum pump for 20 to 30 minutes,
until 600 microns of vacuum is obtained. Close
valves A and B, and observe vacuum gauge for
a few minutes. A rise in pressure would
indicate a possible leak or moisture remaining in
the system. With valves A and B closed, stop
the vacuum pump.
4) Remove the hose from the vacuum pump and
place it on the charging cylinder. See Fig. 17B.
Open valve C.
Discharge the line at the manifold connection.
5) The system is now ready for final charging.
14 Room Air Conditioner
Disassembly Instructions
Equipment needed: Vacuum pump, Charging cylinder, Manifold gauge, Brazing equipment. Pinch-off tool capa-
ble of making a vapor-proof seal, Leak detector, Tubing cutter, Hand Tools to remove components, Service valve.
COMPOUND GAUGE
CONDENSER
(HIGH PRESSURE SIDE)
MANIFOLD
GAUGE
A
B
CAPILLARY TUBE
SEE INSETS
BELOW
EVAPORATOR
(LOW PRESSURE SIDE)
COMPRESSOR
HI
LOW
A
B
A
B
EXTERNAL
VACUUM PUMP
CHARGING
CYLINDER
C
FIG. 17A-Pulling Vacuum
FIG 17B-Charging
Service Manual 15
Schematic Diagram
Schematic Diagram
Wiring Diagram
I ELECTRIC HEATING MODEL
16 Room Air Conditioner
Troubleshooting Guide
Troubleshooting Guide
Piping System
CONDENSER COILS
FAN
CAPILLARY TUBE
COMPRESSOR
MOTOR
TURBO FAN
EVAPORATOR COILS
: REFRIGERANT FLOW
Following is a brief description of the important components and their functions in the refrigeration system.
Refer to Fig. 18 to follow the refrigeration cycle and the flow of the refrigerant in the cooling cycle.
ROOM AIR CONDITIONER
CYCLE OF REFRIGERATION
EVAPORATOR COILS
CONDENSER COILS
VAPOR INLET
SUCTION LIME
COOL LOW PRESSURE VAPOR
HOT
DISCHARGED
AIR
COMPLETE LIQUID
BOIL OFF POINT
COOLED
AIR
ROOM AIR HEAT LOAD
OUTSIDE COOLING
AIR FOR REFRIGERANT
PASS THROUGH
MOTOR
COMPRESSOR
OIL
LIQUID
PRESSURE
DROP
LIQUID OUTLET
HIGH PRESSURE VAPOR
(LIQUID REFRIGERANT)
LIQUID PEFRIGERANT
CAPILLARY TUBE
LOW PRESSURE VAPOR
FIG. 18
Service Manual 17
Troubleshooting Guide
Troubleshooting Guide
In general, possible trouble is classified in two causes.
The one is called Starting Failure which is caused from an electrical defect, and the other is Ineffective Air
Conditioning caused by a defect in the refrigeration circuit and improper application.
Unit is running but cooling is ineffective
Ineffective Cooling
Check of cold air circulation
for smooth flow.
Check of outdoor coil
(heat exchanger) & the fan
operation.
Check heat load increase.
Unexpected residue
Overloaded Circuit
Dirty indoor coil
(Heat exchanger)
Check gas leakage.
Repair gas leak.
Malfunction of fan
Check of inside gas
pressure.
Clogged of air filter
Obstruction at air outlet
Replacement of unit if the
unit is beyond repair.
Adjusting of refrigerant
charge
Stop of auto air-swing
Correct above trouble
Malfunction of compressor
Replacement of
compressor
Check clogging in
refrigeration circuit.
Satisfactory operation with
temperature difference of
inlet & outlet air ; 44.6~50˚F
Repair clogging in
refrigeration circuit.
18 Room Air Conditioner
Troubleshooting Guide
Fails to Start
Check of power source.
Check of circuit breaker
and fuse.
Check of control switch
setting.
Gas leakage of feeler bulb
of thermostat
Check of control switch.
Only compressor fails to
start.
Only fan fails to start.
Improper wiring.
Drop of power voltage.
Improper thermostat setting
Defect of fan motor
capacitor.
Defect of compressor
capacitor.
Loose terminal connection.
Improper wiring
Irregular motor resistance
(
).
Irregular motor insulation
).
Check capacitor.
Replacement.
(
Replacement of fan motor
Regular but fails to start
Irregular motor resistance ( )
Irregular motor insulation ( )
Replacement of compressor
(locking of rotor, metal)
Replacement of compressor
(Motor damaged)
Service Manual 19
Troubleshooting Guide
COMPLAINT
CAUSE
REMEDY
Fan motor will not run.
No power
Check voltage at outlet. Correct if none.
Wire disconnected or
connection loose
Connect wire. Refer to wiring diagram for terminal
identification. Repair or replace loose terminal.
Capacitor (Discharge
Test capacitor.
capacitor before testing.)
Replace if not within ±10% of manufacturer's
rating. Replace if shorted, open, or damaged.
Fan blade hitting shroud or blower wheel hitting
scroll. Realign assembly.
Will not rotate
Units using slinger ring condenser fans must
have 1/4 to 5/16 inch clearance to the base. If it is
hitting the base, shim up the bottom of the fan
motor with mounting screw(s).
Check fan motor bearings; if motor shaft will not
rotate, replace the motor.
Fan motor runs
intermittently
Revolves on overload.
Check voltage. See limits on this page. If not within
limits, call an electrician.
Test capacitor.
Check bearings. Does the fan blade rotate freely?
If not, replace fan motor.
Pay attention to any change from high speed to
low speed. If the speed does not change, replace
the motor.
Fan motor noise.
Grommets
Fan
Check grommets; if worn or missing, replace them.
If cracked, out of balance, or partially missing,
replace it.
Turbo fan
If cracked, out of balance, or partially missing,
replace it.
Loose set screw
Worn bearings
Tighten it.
If knocking sounds continue when running or
loose, replace the motor. If the motor hums or
noise appears to be internal while running,
replace motor.
20 Room Air Conditioner
Troubleshooting Guide
REMEDY
COMPLAINT
CAUSE
Compressor will not run,
but fan motor runs.
Voltage
Wiring
Check voltage. See the limits on the preceding.
page. If not within limits, call an electrician.
Check the wire connections, if loose, repair or
replace the terminal. If wires are off, refer to wiring
diagram for identification, and replace. Check wire
locations. If not per wiring diagram, correct.
Check the capacitor.
Replace if not within ±10% of manufacturers
rating. Replace if shorted, open, or damaged.
Capacitor (Discharge
capacitor before
servicing.)
Check the compressor for open circuit or
ground. If open or grounded, replace the compres-
sor.
Compressor
Overload
Check the compressor overload, if externally
mounted. Replace if open. (If the compressor
temperature is high, remove the overload, cool it,
and retest.)
ROOM AIR CONDITIONER VOLTAGE LIMITS
NAME PLATE RATING
MINIMUM
MAXIMUM
126.5V
253V
115V
103.5V
187V
208/230V
Service Manual 21
Troubleshooting Guide
REMEDY
COMPLAINT
CAUSE
Compressor cycles
on overload.
Voltage
Check the voltage. See the limits on the preced-
ing page. If not within limits, call an electrician.
Overload
Check overload, if externally mounted.
Replace if open. (If the compressor temperature
is high, remove the overload, cool, and retest.)
Fan motor
If not running, determine the cause. Replace if
required.
Condenser air flow
restriction
Remove the cabinet. inspect the interior surface
of the condenser; if restricted, clean carefully
with a vacuum cleaner (do not damage fins) or
brush. Clean the interior base before
reassembling.
Condenser fins
(damaged)
If condenser fins are closed over a large area
on the coil surface, head pressures will increase,
causing the compressor to cycle. Straighten the
fins or replace the coil.
Capacitor
Test capacitor.
Wiring
Refrigerating system
Insufficient cooling or heat- Air filter
Check the terminals. If loose, repair or replace.
Check the system for a restriction.
If restricted, clean of replace.
ing
Exhaust damper door
Close if open.
Unit undersized
Blower or fan
Determine if the unit is properly sized for the area to
be cooled.
Excessive noise.
Check the set screw or clamp. If loose or missing,
correct. If the blower or fan is hitting air guide,
rearrange the air handling parts.
Remove the cabinet and carefully rearrange tubing
not to contact cabinet, compressor, shroud, and bar-
rier.
Copper tubing
22 Room Air Conditioner
Product Specifications
MODELS
UE08C13
REMARK
ITEMS
1Ø,115V,60HZ
POWER SUPPLY
CAPACITY(Btu/h)
INPUT(W)
8,000
830
7.5
COOLING
RUNNING CURRENT(A)
E.E.R(Btu/W.h)
9.6
CAPACITY(Btu/h)
INPUT(W)
3,850
1,230
10.7
HEATING
RUNNING CURRENT(A)
80
95
70
47
67
(DB)
(WB)
(WB)
INDOOR(°F)
COOLING
HEATING
OUTDOOR(°F)
(DB) 75
OPERATING
TEMPERATURE
)
INDOOR(°F)
(
(
60
(DB)
(DB)
WB
OUTDOOR(°F)
)
44
WB
REFRIGERANT(R410A)
EVAPORATOR
CHARGE(g）
320
(11.3OZ)
2 ROW 12 STACKS
Ø5.0 3 ROW 18 STACKS,L-BENDED TYPE
TURBO FAN
LOUVER-
FIN TYPE
CONDENSER
FAN,INDOOR
PROPELLER TYPE FAN WITH SLINGER-RING
2/2/2
FAN,OUTDOOR
(FAN/COOLING/HEATING)
FAN,SPEEDS
FAN,MOTOR
6 POLES
TOUCH PANEL
OPERATION CONTROL
ROOM TEMP.CONTROL
THERMISTOR
VERTICAL LOUVER (RIGHT&LEFT)
AIR DIRECTTION CONTROL
HORIZONTAL LOUVER (UP&DOWN)
TOP - DOWN
CONSTRUCTION
3.5KW,230V
ELECTRIC HEATER
COMPRESSOR
EXTERNAL OVERLOAD PROTECTOR
INTERANL THERMAL PROTECTOR
PROTECTOR
FAN,MOTOR
ELECTRIC HEATER
FUSE LINK,BIMETAL THERMOSTAT
1.92m（3WIRE WITH GROUDING)
POWER CORD
DRAIN SYSTEM
ATTACHMENT PLUG(CORD-CONNECTED TYPE)
SPLASHED BY FAN SLINGER
80/36
NET WEIGHT(lbs/kg)
24 21/32 x 14 13/32 x 19 21/32
656 x 366 x 499
DIMENSION
(Wx Hx D)
( inch)
( mm)
( inch)
(mm)
25 7/8 x 15 17/32 x 16 23/32
SLEEVE DIMESION
(Wx Hx D)
OPTIONA PART
656 x 394 x 425
SLEEVE DEPTH
( inch)
(mm)
20
510
WITH FRONT GRILLE
Service Manual 23
Product Specifications
MODELS
UE10C33
REMARK
ITEMS
1Ø,230/208V,60HZ
POWER SUPPLY
CAPACITY(Btu/h)
INPUT(W)
10 000/9 800
1,080/1 040
4.7/5.2
COOLING
RUNNING CURRENT(A)
E.E.R(Btu/W.h)
9.4/9.4
11 200/9 200
3,500/2 900
15.3/14.0
CAPACITY(Btu/h)
INPUT(W)
HEATING
RUNNING CURRENT(A)
80
95
70
47
67
(WB)
(DB)
INDOOR(°F)
COOLING
HEATING
(DB) 75 (WB)
OUTDOOR(°F)
OPERATING
TEMPERATURE
(
(
)
60
(DB)
(DB)
WB
INDOOR(°F)
OUTDOOR(°F)
)
44
WB
REFRIGERANT(R410A)
EVAPORATOR
CHARGE(g）
440
(15.5OZ)
3 ROW 12 STACKS
2 ROW 18 STACKS,L-BENDED TYPE 1 ROW
TURBO FAN
LOUVER-
FIN TYPE
CONDENSER
FAN,INDOOR
PROPELLER TYPE FAN WITH SLINGER-RING
2/2/2
FAN,OUTDOOR
(FAN/COOLING/HEATING)
FAN,SPEEDS
FAN,MOTOR
6 POLES
TOUCH PANEL
OPERATION CONTROL
ROOM TEMP.CONTROL
THERMISTOR
VERTICAL LOUVER (RIGHT&LEFT)
AIR DIRECTTION CONTROL
HORIZONTAL LOUVER (UP&DOWN)
TOP - DOWN
CONSTRUCTION
3.5KW,230V
ELECTRIC HEATER
COMPRESSOR
EXTERNAL OVERLOAD PROTECTOR
INTERANL THERMAL PROTECTOR
PROTECTOR
FAN,MOTOR
ELECTRIC HEATER
FUSE LINK,BIMETAL THERMOSTAT
1.92m（3WIRE WITH GROUDING)
POWER CORD
DRAIN SYSTEM
ATTACHMENT PLUG(CORD-CONNECTED TYPE)
SPLASHED BY FAN SLINGER
80/36
NET WEIGHT(lbs/kg)
24 21/32 x 14 13/32 x 19 21/32
656 x 366 x 499
DIMENSION
(Wx Hx D)
( inch)
( mm)
( inch)
(mm)
25 7/8 x 15 17/32 x 16 23/32
SLEEVE DIMESION
(Wx Hx D)
OPTIONA PART
656 x 394 x 425
SLEEVE DEPTH
( inch)
(mm)
20
510
WITH FRONT GRILLE
24 Room Air Conditioner
Product Specifications
MODELS
UE12C13
REMARK
ITEMS
1Ø,230/208V,60HZ
POWER SUPPLY
CAPACITY(Btu/h)
INPUT(W)
11 500/11,200
1,220/1 190
5.6/6.0
COOLING
RUNNING CURRENT(A)
E.E.R(Btu/W.h)
9.4/9.4
11 200/9 200
3,500/2 900
15.3/14.0
CAPACITY(Btu/h)
INPUT(W)
HEATING
RUNNING CURRENT(A)
80
95
70
47
67
(WB)
(DB)
INDOOR(°F)
COOLING
HEATING
(DB) 75 (WB)
OUTDOOR(°F)
OPERATING
TEMPERATURE
(
(
)
60
(DB)
(DB)
WB
INDOOR(°F)
)
OUTDOOR(°F)
44
WB
REFRIGERANT(R410A)
EVAPORATOR
CHARGE(g）
540
(19.0OZ)
3 ROW 12 STACKS
2 ROW 18 STACKS,L-BENDED TYPE 1 ROW
TURBO FAN
LOUVER-
FIN TYPE
CONDENSER
FAN,INDOOR
PROPELLER TYPE FAN WITH SLINGER-RING
2/2/2
FAN,OUTDOOR
(FAN/COOLING/HEATING)
FAN,SPEEDS
FAN,MOTOR
6 POLES
TOUCH PANEL
OPERATION CONTROL
ROOM TEMP.CONTROL
THERMISTOR
VERTICAL LOUVER (RIGHT&LEFT)
AIR DIRECTTION CONTROL
HORIZONTAL LOUVER (UP&DOWN)
TOP - DOWN
CONSTRUCTION
3.5KW,230V
ELECTRIC HEATER
COMPRESSOR
EXTERNAL OVERLOAD PROTECTOR
INTERANL THERMAL PROTECTOR
PROTECTOR
FAN,MOTOR
ELECTRIC HEATER
FUSE LINK,BIMETAL THERMOSTAT
1.92m（3WIRE WITH GROUDING)
POWER CORD
DRAIN SYSTEM
ATTACHMENT PLUG(CORD-CONNECTED TYPE)
SPLASHED BY FAN SLINGER
80/36
NET WEIGHT(lbs/kg)
24 21/32 x 14 13/32 x 19 21/32
656 x 366 x 499
DIMENSION
(Wx Hx D)
( inch)
( mm)
( inch)
(mm)
25 7/8 x 15 17/32 x 16 23/32
SLEEVE DIMESION
(Wx Hx D)
OPTIONA PART
656 x 394 x 425
SLEEVE DEPTH
( inch)
(mm)
20
510
WITH FRONT GRILLE
Service Manual 25
Exploded View
Exploded View
130900
135312
C
147582-1
145200
147581
147582-2
435301
435300
152302
135313
132100
731273
352380
D
559011
349001
349480
148000
W48602
E
753000
149980
346811
130410
359012
349600
267110
W48602
552206
A
567480
268711-2
249950
249940
238310
268711-1
B
C
oo
l
E
S
ne
r
g
y
r
a
v
e
F
an
F
2
3
1
L
F
O
W
D
H
M
H
F
E
IG
T
ime
'
F
r
M
O
D
T
E
E
M
P
T
567502
IM
ER
F
E
A
E
N
S
P
D
P
O
W
ER
237200
264110
550140
W0CZZ
26 Room Air Conditioner
LocNo
Description
UE08C13
W0CZZ
130410
130900
132100
135303
135312
238310
W48602
346811
147581
147582-1
147582-2
349600
149980
550140
152302
352380
359012
559011
567480
264110
267110
567502
268711-2
268711-1
435300
237200
731273
249950
435301
349480
753000
CAPACITOR,FILM,BOX
BASE ASSEMBLY,SINGLE
CABINET
67301909
67302923
67303718
67303504
67306113
67306020
67304802
67302500
67303019
67306203
67306252
67306253
67303607
67303111
67305000
67304304
67302735
67302608
67303202
67307808
67300031
67302239
67301907
67307644
67307646
67307208
67305527
67306307
67305528
67304801
67303406
67310101
FRAME
GRILLE,INLET
GRILLE ASSEMBLY,FRONT(SINGLE)
ESCUTCHEON
CLAMP,SPRING
MOTOR ASSEMBLY,SINGLE
LOUVER,HORIZONTAL
LOUVER,VERTICAL
LOUVER,VERTICAL
BRACKET,MOTOR
SHROUD
DAMPER,COMPRESSOR
FILTER,AIR
AIR GUIDE
FAN,TURBO
FAN ASSEMBLY,AXIAL
THERMISTOR ASSEMBLY
POWER CORD ASSEMBLY
REMOTE CONTROLLER ASSEMBLY
OverloadProtect
PWB(PCB) ASSEMBLY,MAIN
PWB(PCB) ASSEMBLY,DISPLAY
PLASTIC REAR AIR DEFLECTOR
PANEL,CONTROL
INSTALL PART ASSEMBLY,SINGLE
CASE ASSEMBLY,CONTROL
GRILLE,REAR
ORIFICE
Heater,Electric
Service Manual 27
LocNo
Description
UE10C33
W0CZZ
130410
130900
132100
135303
135312
238310
W48602
346811
147581
147582-1
147582-2
349600
149980
550140
152302
352380
359012
559011
567480
264110
267110
567502
268711-2
268711-1
435300
237200
731273
249950
435301
349480
753000
CAPACITOR,FILM,BOX
BASE ASSEMBLY,SINGLE
CABINET
67301910
67302923
67303718
67303504
67306104
67306005
67304802
67302500
67303008
67306203
67306252
67306253
67303607
67303111
67305000
67304304
67302735
67302608
67303202
67307808
67300029
67302239
67301908
67307645
67307646
67307208
67305527
67306307
67305529
67304801
67303406
67310100
FRAME
GRILLE,INLET
GRILLE ASSEMBLY,FRONT(SINGLE)
ESCUTCHEON
CLAMP,SPRING
MOTOR ASSEMBLY,SINGLE
LOUVER,HORIZONTAL
LOUVER,VERTICAL
LOUVER,VERTICAL
BRACKET,MOTOR
SHROUD
DAMPER,COMPRESSOR
FILTER,AIR
AIR GUIDE
FAN,TURBO
FAN ASSEMBLY,AXIAL
THERMISTOR ASSEMBLY
POWER CORD ASSEMBLY
REMOTE CONTROLLER ASSEMBLY
OverloadProtect
PWB(PCB) ASSEMBLY,MAIN
PWB(PCB) ASSEMBLY,DISPLAY
PLASTIC REAR AIR DEFLECTOR
PANEL,CONTROL
INSTALL PART ASSEMBLY,SINGLE
CASE ASSEMBLY,CONTROL
GRILLE,REAR
ORIFICE
Heater,Electric
28 Room Air Conditioner
LocNo
Description
UE12C33
W0CZZ
130410
130900
132100
135303
135312
238310
W48602
346811
147581
147582-1
147582-2
349600
149980
550140
152302
352380
359012
559011
567480
264110
267110
567502
268711-2
268711-1
435300
237200
731273
249950
435301
349480
753000
CAPACITOR,FILM,BOX
BASE ASSEMBLY,SINGLE
CABINET
67301911
67302930
67303718
67303504
67306104
67306005
67304802
67302500
67303020
67306203
67306252
67306253
67303606
67303111
67305000
67304304
67302735
67302608
67303202
67307808
67300029
67302239
67301906
67307645
67307646
67307208
67305527
67306307
67305530
67304801
67303406
67310100
FRAME
GRILLE,INLET
GRILLE ASSEMBLY,FRONT(SINGLE)
ESCUTCHEON
CLAMP,SPRING
MOTOR ASSEMBLY,SINGLE
LOUVER,HORIZONTAL
LOUVER,VERTICAL
LOUVER,VERTICAL
BRACKET,MOTOR
SHROUD
DAMPER,COMPRESSOR
FILTER,AIR
AIR GUIDE
FAN,TURBO
FAN ASSEMBLY,AXIAL
THERMISTOR ASSEMBLY
POWER CORD ASSEMBLY
REMOTE CONTROLLER ASSEMBLY
OverloadProtect
PWB(PCB) ASSEMBLY,MAIN
PWB(PCB) ASSEMBLY,DISPLAY
PLASTIC REAR AIR DEFLECTOR
PANEL,CONTROL
INSTALL PART ASSEMBLY,SINGLE
CASE ASSEMBLY,CONTROL
GRILLE,REAR
ORIFICE
Heater,Electric
Service Manual 29
FRIEDRICH AIR CONDITIONING CO.
Post Office Box 1540 • 4200 N. Pan Am Expressway • San Antonio, Texas 78295-1540
• (210) 357-4400 • FAX (210) 357-4480
Printed in the U.S.A
Unifit Heat Cool Svc Parts 2010 (05/10)
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