Room Air Conditioner
Service and Parts
Manual
TM
ZStar
ZQ08 (4-04)
1.3 SPECIFICATIONS
MODELS
ITEMS
ZQ08A10C
1ø, 115V, 60Hz
POWER SUPPLY
COOLING CAPACITY
INPUT
(Btu/h)
8,000
820
7.6
(W)
(A)
RUNNING CURRENT
E.E.R
(Btu/W.h)
9.8
OPERATING
INDOOR
(°C)
26.7(DB)*
35(DB)
19.4(WB)**
23.9(WB)
TEMPERATURE
OUTDOOR (°C)
REFRIGERANT (R-22) CHARGE
EVAPORATOR
261g (9.2 oz)
2 ROW 14 STACKS, S-FIN(LG-SLIT) TYPE
2 ROW 16 STACKS, S-FIN(LG-LOUVER) TYPE
TURBO FAN
CONDENSER
FAN, INDOOR
FAN, OUTDOOR
PROPELLER TYPE FAN WITH SLINGER-RING
2/3
FAN SPEEDS, FAN/COOLING
FAN MOTOR
6 POLES
OPERATION CONTROL
ROOM TEMP. CONTROL
ROTARY SWITCH
THERMOSTAT
VERTICAL LOUVER (RIGHT & LEFT)
HORIZONTAL LOUVER (UP & DOWN)
SLIDE IN-OUT CHASSIS
AIR DIRECTION CONTROL
CONSTRUCTION
COMPRESSOR
PROTECTOR
OVERLOAD PROTECTOR
INTERNAL THERMAL PROTECTOR
1.8m(7') (3 WIRE WITH GROUDING)
ATTACHMENT PLUG (CORD-CONNECTED TYPE)
SPLASHED BY FAN SLINGER
60/27
FAN MOTOR
POWER CORD
DRAIN SYSTEM
NET WEIGHT
(lbs/kg)
inch
1
7
11
OUTSIDE DIMENSION
(W x H x D)
18 /2 x 13 /8 x 20 /16
470 x 353 x 525
mm
* DB : dry bulb
** WB : wet bulb
—3—
1.4 FEATURES
• Designed for cooling only.
• Built in adjustable THERMOSTAT.
• Washable one-touch filter.
• Powerful and whisper cooling.
• Slide-in and slide-out chassis for the simple
installation and service.
• Compact size.
• Reliable and efficient rotary compressor equipped.
• Side air-intake, side cooled-air discharge.
1.5 CONTROL LOCATIONS
1.5.1 CONTROL ONLY MODEL
• VENTILATION
The ventilation lever must be in the CLOSE position
in order to maintain the best cooling conditions.
When fresh air is necessary in the room, set the
ventilation lever to the OPEN position.
CLOSE
VENT
OPEN
The damper is opened and room air is exhausted.
Part B
NOTE
Part
A
Before using the ventilation feature,
make a ventilation kit. First, pull down
part Ⓐ to horziontal line with part Ⓑ.
• FOR NORMAL COOLING
1. Turn the Mode switch to the High, Med or
Low Cool setting.
2. Set the Temperature control to the desired
temperature point (the mid-point is a good
starting position). If the room temperature is not
satisfactory after a reasonable time, adjust the
control to a cooler or warmer setting, as
appropriate.
• FOR MAXIMUM COOLING
1. Turn the Mode switch to the High Cool setting.
2. Set the temperature control to the highest
temperature point (all the way to the right).
• FOR QUIETER OPERATION
1. Turn the Mode switch to the Low Cool setting.
2. Set the Temperature control as needed.
• Energy Saver Switch
This rocker switch can be depressed to either YES
or NO. In the YES position, you will get the most
economical operation. Both the fan and the
compressor will cycle on and off together,
maintaining the selected temperature at a more
constant level and reducing the humidity more
efficiently. This control will only operate when the
unit is in a cooling mode. In the NO position, the
fan will run constantly as long as the unit is in the
cooling mode.
—4—
2. DISASSEMBLY INSTRUCTIONS
— Before disassembling, turn the POWER SWITCH to OFF and disconnect the power cord.
2.1 MECHANICAL PARTS
2.1.1 FRONT GRILLE
1. Open the INLET GRILLE downward and remove
the air filter.
2. Remove the screw which fastens the FRONT GRILLE.
3. Pull the FRONT GRILLE from the right side.
4. Remove the FRONT GRILLE.
5. Re-install the component by referring to the above
removal procedure. (See figure 1)
Figure 1
Shipping screws
2.1.2 CABINET
1. After disassembling the FRONT GRILLE, remove
two screws which fasten the CABINET at both
sides.
2. Remove two screws which fasten the CABINET at
back.
3. Pull the BASE PAN forward. (See figure 2)
Figure 2
2.1.3 CONTROL BOX
1. Disconnect the unit from the power source.
2. Remove the front grille. (Refer to section 2.1.1)
3. Remove the cabinet. (Refer to section 2.1.2)
4. Remove the screw which fastens the control box
cover.
5. Remove the housing which connects motor wire in
the control box.
6. Remove the 3 leads from the compressor.
(Refer to section 2.3.1)
7.Discharge the capacitor by placing a 20,000
ohmresistor across the capacitor terminals.
8. Remove the 2 screws which fasten the control
box.(See Figure 3)
Figure 3
9. Pull the control box forward completely.
10. Re-install the components by referring to the
removal procedure, above. (See Figure 3)
(Refer to the circuit diagram found on page 24 in
this manual or on the control box.)
—5—
2.2 AIR HANDLING PARTS
2.2.1 AIR GUIDE AND BLOWER
1. Remove the front grille. (Refer to section 2.1.1)
2. Remove the cabinet. (Refer to section 2.1.2)
3. Remove the control box. (Refer to section 2.1.3)
4. Remove the 3 screws which fasten the brace.
5. Remove the brace.
6. Remove the 2 screws which fasten the evaporator.
7. Move the evaporator forward and pulling it upward
slightly. (See Figure 4)
8. Move the evaporator to the left carefully.
9. Pull out the hook of orifice by pushing the tabs and
remove it. (See Figure 5)
Figure 4
10. Remove the clamp with a hand plier which
secures the blower.
11. Remove the blower.
12. Remove the 4 screws which fasten the air guide
from the barrier.
13. Move the air guide backward, pulling out from the
base pan.
14. Re-install the components by referring to the
removal procedure, above.
Figure 5
2.2.2 FAN AND SHROUD
1. Remove the cabinet. (Refer to section 2.1.2)
2. Remove the brace (Refer to section 2.2.1)
3. Remove the 3 screws which fasten the condenser.
4. Move the condenser to the left carefully.
5. Remove the clamp which secures the fan.
6. Remove the fan and then pull out the shroud.
(See Figure 6)
7. Re-install by referring to the removal procedure.
Figure 6
—6—
2.3 ELECTRICAL PARTS
2.3.1 OVERLOAD PROTECTOR
1. Remove the cabinet. (Refer to section 2.1.2)
2. Remove the nut which fastens the terminal cover.
3. Remove the terminal cover. (See Figure 7)
4. Remove all the leads from the overload protector.
5. Remove the overload protector.
6. Re-install the component by referring to the
removal procedure, above.
Figure 7
2.3.2 COMPRESSOR
1. Remove the cabinet. (Refer to section 2.1.2)
2. Discharge the refrigerant system using a 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. Remove the overload protector. (Refer to section
2.3.1)
4. After purging the unit completely, unbraze the
suction and discharge tubes at the compressor
connections.
Figure 8
5. Remove the 3 nuts and the 3 washers which
fasten the compressor.
6. Remove the compressor. (See Figure 8)
7. Re-install the components by referring to the
removal procedure, above.
2.3.3 CAPACITOR
1. Remove the control box. (Refer to section 2.1.3)
2. Remove the knobs and the screw which fasten
control panel from control box.
3. Remove the screw which located in the front.
4. Open the bottom side of control box.
5. Remove the screw and the clamp which fastens the
capacitor.
6. Disconnect all the leads of capacitor terminals.
7. Re-install the components by referring to the
removal procedure, above. (See Figure 9)
Figure 9
—7—
2.3.4 POWER CORD
1. Remove the control box. (Refer to section 2.1.3)
2. Open the control box. (Refer to section 2.3.3)
3. Disconnect the grounding screw from the control
box.
4. Disconnect the 2 receptacles.
5. Remove a screw which fastens the clip cord.
(See Figure 10)
6. Remove the power cord.
7. Re-install the component by referring to the above
removal procedure, above.
(Use only one ground-marked hole
connection.)
for ground
Figure 10
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 attached
at the unit.)
2.3.5 THERMOSTAT
1. Remove the control box. (Refer to section 2.1.3)
2. Open the control box. (Refer to section 2.3.3)
3. Remove the 2 screws which fasten the thermostat.
4. Disconnect 2 leads of thermostat terminals.
5. Remove the thermostat.
Figure 11
6. Re-install the components by refereing to the
above removal procedure. (See Figure 11)
2.3.6 ROTARY SWITCH
1. Remove the control box. (Refer to section 2.1.3)
2. Open the control box. (Refer to section 2.3.3)
3. Remove the 2 screws which fasten the rotary
switch.
4. Disconnect all the leads of the rotary switch
terminals.
5. Remove the rotary switch.
6. Re-install the components by referring to the
above removal procedure. (See Figure 12)
Figure 12
2.3.7 MOTOR
1. Remove the cabinet. (Refer to section 2.1.2)
2. Remove the evaporator. (Refer to section 2.2.1)
3. Remove the orifice. (Refer to section 2.2.1)
4. Remove the blower. (Refer to section 2.2.1)
5. Remove the fan. (Refer to section 2.2.2)
6. Remove the control box cover and housing of the
motor in the control box. (Refer to section 2.1.3)
7. Remove the 2 screws which fasten the motor from
the mount motor. (See Figure 13)
8. Remove the motor.
9. Re-install the components by referring to the
removal procedure, above.(See Figure 13)
Figure 13
—8—
2.4 REFRIGERATING CYCLE
CAUTION
Discharge the refrigerant system using a
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.
2.4.1 CONDENSER
1. Remove the cabinet. (Refer to section 2.1.2)
2. Remove the 3 screws which fasten the
brace.(Refer to section 2.2.1)
3. Remove the 3 screws which fasten the condenser
and shroud.
4. After discharging the refrigerant completely,
unbraze the interconnecting tube at the condenser
connections.
Figure 14
5. Remove the condenser carefully.
6. Re-install the component by referring to notes.
(See Figure 14)
2.4.2 EVAPORATOR
1. Remove the cabinet. (Refer to section 2.1.2)
2. Remove the 2 screws which fasten the evaporator.
3. Move the evaporator sideways carefully.
(Refer to section 2.2.1)
4. After discharging the refrigerant completely,
unbraze the interconnecting tube at the evaporator
connections.
5. Remove the evaporator carefully.
6. Re-install the component by referring to notes.
(See Figure 15)
Figure 15
2.4.3 CAPILLARY TUBE
1. Remove the cabinet. (Refer to section 2.1.2)
2. After discharging the refrigerant completely,
unbraze the interconnecting tube at the capillary
tube.(See caution above)
3. Remove the capillary tube.
4. Re-install the component by referring to notes.
—9—
NOTES
— Replacement of the refrigeration cycle.
6. Recharge as follows :
1. When replacing the refrigeration cycle, be sure to
TM
Discharge the refrigerant system using a Freon
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 figure
16B.
If there is no valve to attach the recovery system,
install one (such as a WATCO A-1) before venting
TM
the Freon . Leave the valve in place after
servicing the system.
2. After discharging the unit completely, remove the
desired component, and unbraze the pinch-off
tubes.
With valve C open, discharge the hose at the
manifold connection.
3. Solder service valves into the pinch-off tube ports,
leaving the valves open.
4. Solder the pinch-off tubes with Service valves.
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. Evacuate as follows.
1) Connect the vacuum pump, as illustrated figure
16A.
5) With the unit running, open valve B and add the
balance of the charge.
2) Start the vacuum pump, slowly open manifold
valves A and B with two full turns
counterclockwise and leave the valves open.
The vacuum pump is now pulling through valves
A and B up to valve C by means of the manifold
and entire system.
a. Do not add the liquid refrigerant to the Low-
side.
b. Watch the Low-side gauge; allow pressure to
rise to 30 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.
CAUTION
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.
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 vaccum 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 figure
16B.
Open valve C.
Discharge the line at the manifold connection.
5) The system is now ready for final charging.
—10—
Equipment needed: Vacuum pump, Charging cylinder, Manifold gauge, Brazing equipment. Pin-off tool capable
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
A
B
B
EXTERNAL
VACUUM PUMP
CHARGING
CYLINDER
C
Figure 16B-Charging
Figure 16A-Pulling Vacuum
—11—
3. INSTALLATION
3.1 INSTALLATION HARDWARE
Window sash seal
Left frame curtain
Type A (13)
Type B (3)
Foam top
window gasket
Type C (5)
Frame guide(2)
Right frame
curtain
Window locking
bracket
Nut (2)
Bolt (2)
Sill support(2)
3.2 SELECT THE BEST LOCATION
Step 1. To prevent vibration and noise, make sure the unit is
installed securely and firmly
FENCE
AWNING
Step 2. If possible, install the unit where sunlight does not shine
directly on the unit.
HEAT
RADIATION
Step 3. The outside of the cabinet must extend
outward for at least 11" and there should be no
obstacles, such as a fence or wall, within 20" from the
back of the cabinet because it will prevent heat
radiation of the condenser.
COOLED
AIR
About 1/2"
Restriction of outside air will greatly reduce the cooling
efficiency of the air conditioner.
Over 20"
Step 4. Install the unit with a little tilt outward not to leak the
condensed water into the room (about 10~15cm or 1/4
bubble with level).
1/4 Bubble
CAUTION: All side louvers of the cabinet must remain exposed
to the outside of the structure.
Level
—12—
3.3 WINDOW REQUIREMENTS
Step 1. These instructions are for a standard double hung
window. You will need to modify them for other
types of windows.
(W2ith5a"cctoordi3on6p"anels)
Step 2. The air conditioner can be installed without the
frame curtain if needed to fit in a narrow window.
See the window opening dimensions to the right.
15" min
Stool
(With frame curtain)
Offset
1/2" to 11/4"
Step 3. All supporting parts must be secured to firm wood,
masonry, or metal.
Sill
Step 4. The electric outlet must be within reach of the power
cord.
Exterior
Interior wall
18 1/2" min
(Without frame curtain)
3.4 STORM WINDOW REQUIREMENTS
A storm window frame will not allow the air conditioner to tilt
toward the outside and will keep it from draining properly.
To adjust for this, attach a piece of wood to the stool.
Wood
1/2" higher
than frame
WOOD PIECES–
Stool
Width: Minimum 1 1/2"(38mm)
Length: Long enough to fit inside the window frame.
Storm window
frame
Thickness: To determine the thickness, place a piece of
wood on the stool to make it 1/2" higher than the top of the
storm window frame.
Attach securely with nails or screws provided.
—13—
3.5 PREPARING THE UNIT FOR INSTALLATION
Shipping screws
ꢀ Remove the 2 shipping screws from the back of the
case.
ꢀ Remove the 2 screws on each side of the case.
Keep these for later use.
ꢀ Slide the air conditioner from the case by gripping
the base pan handle and pulling forward while
bracing the case.
3.6 BEFORE INSTALLATION...
ꢀ Cut the window sash seal to the proper length. Peel
off the backing and attach the seal to the underside
of the window sash.
Window sash seal
ꢀ Carefully insert the plastic frame guides into the
bottom of the case on each side.
When the frame guides are set, the arrows should be
pointing toward the back end of the unit.
Bottom of
case
Frame
guide
ꢀꢀInsert the frames for the frame curtains into the top
mounting rail and the frame guides. Attach the
frame curtains to the side of the case using 4 type A
screws
(Type A)
(Type A)
—14—
3.7 INSTALL THE CASE IN THE WINDOW
Step 1. Open the window and mark the centerline of
the window stool (or desired air conditioner
location).
Window Sash Top
Sash
seal
mountaing rail
Step 2. Carefully place the case on the window stool
and align the center mark on the bottom front
with the centerline of the stool
Cabinet
Top
mounting
rail
Frame curtains
OUTDOOR
Window stool
Step 3. Pull the window down behind the top
mounting rail
Front angle
INDOOR
NOTE: Do not shut the window so tightly that
movement of the frame curtains is restricted.
Sill Support
Nut
Bolt
Step 4. Loosely assemble the sill supports.
Screw(Type A)
Frame guide
Step 5. Select the position that will place the sill
supports near the outermost point on the sill.
Attach the sill supports to the case track hole
in relation to the selected position using 2 type
A screws in each support.
Cabinet
OUTDOOR
INDOOR
Sash
Track
Step 6. Adjust the bolt and the nut in each support so
that the case is installed with a slight
downward tilt (about 1/2").
Step 7. Secure the case to the window stool by using
3 type B screws.
Front Angle
Screw(Type B)
Sill Support
Step 8. Pull the frame curtains to each window sash
track. Attach them on each side to the window
sash and the window stool using 4 type C
screws.
Screw
(Type C)
3.8 INSTALL THE WINDOW LOCKING BRACKET
AND THE FOAM TOP WINDOW GASKET
Screw
(Type C)
Step 1. Attach the window locking bracket with type C
screw.
Step 2. Cut the foam top window gasket to the
window width.
Foam top window gasket
Step 3. Stuff the foam between the glass and the
window to prevent air and insects from getting
into the room.
—15—
3.9 INSTALL THE AIR CONDITIONER IN THE CASE
Step 1. Slide the air conditioner into the case. Reinstall the
2 screws removed earlier on each side of the case.
Power Cord
Screw
Screw
Step 2. Before installing the front grille, pull out
the vent control lever located above the unit control
knobs, as shown.
Step 3. Attach the front grille to the case by inserting the
tabs on the grille into the slots on the front of the
case. Push the grille in until it snaps into place.
When you detach the front grille from the case, push the
grille to your right side and pull it toward you.
Step 4. Lift the inlet grille and secure the front grille with a
type A screw. Lower the inlet grille into place.
3.10 TO REVERSE THE GRILLE OPENING
The Friedrich ZQ08A10A has a reversible grille. The grille is
designed to open from both the top and the bottom.
To reverse the grille opening, you must follow the following
steps;
Step 1. Pull the entire grill of the front of the unit and locate
the hinges that hold the grille in place on the inside
of the grille.
Step 2. Insert the tip of a flat screwdriver in between one of
the Hinges and the ball shaped bearing of the grille.
Step 3. Very carefully pull the bearing out of the socket of
the Hinge and repeat steps 1-3 for the remaining
hinge and socket.
Inlet Grille
Step 4. Locate the top hinges on the grille.
Step 5. Turn the grille upside down and using flat
screwdriver, create an opening on the top hinge and
insert the ball shaped bearing to snap the grille in
place. Repeat the same steps on the remaining
hinge.
—16—
4. TROUBLESHOOTING GUIDE
4.1 OUTSIDE DIMENSIONS
525mm(20 11/16")
470mm(18 1/2")
250mm(10")
—17—
4.2 PIPING SYSTEM
CONDENSER COIL
FAN
CAPILLARY TUBE
COMPRESSOR
MOTOR
BLOWER
EVAPORATOR COIL
TM
Discharge the refrigerant system using a Freon Recovery
System. If there is no valve to attach the recovery system,
: REFRIGERANT FLOW
TM
install one (such as a WATCO A-1) before venting the Freon .
Leave the valve in place after servicing the system. Do not
TM
vent Freon into the atmosphere.
The following is a brief description of the important components and their function in what is called the refrigeration
system. Reference should made to figure 17 to follow the refrigerating cycle and the flow of the refrigerant in the
cooling cycle.
ROOM AIR CONITIONER
CYCLE OF REFRIGERATION
EVAPORATOR COILS
CONDENSER COILS
VAPOR INLET
SUCTION LINE
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 REFRIGERANT
LOW PRESSURE VAPOR
CAPILLARY TUBE
Figure 17
—18—
4.3 TROUBLESHOOTING GUIDE
In general, possible trouble is classified in two kinds.
The one is called Starting Failure which is caused from an electrical defect. The other is Ineffective Air
Conditioning caused by a defect in the refrigeration circuit and improper application.
Unit runs but poor cooling is ineffective.
Ineffective Cooling
Check of cold air circulation
for smooth flow.
Check of outdoor coil
(heat exchanger) & fan
operation.
Check heat load
increase.
Clean condenser.
Dirty indoor coil
(Heat exchanger)
Check gas leakage.
Repair gas leak.
Not on separate circuit
Malfunction of fan
Clogged of air filter
Check inside gas
pressure.
Replacement of unit if the
unit is beyond repair.
Obstruction at air outlet
Remove obstruction.
Adjusting of refrigerant
charge
Malfunction of compressor
Check clogging in
refrigeration circuit.
Replacement of
compressor
Satisfactory operation with
temperature difference of
inlet & outlet air ;
Repair clogging in
refrigeration circuit.
44~50°F(7~10°C)
—19—
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
Resistance irregular motor
(
).
Insulation irregular motor
).
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)
—20—
ROOM AIR CONDITIONER VOLTAGE LIMITS
NAME PLATE RATING
MINIMUM
MAXIMUM
115V
103.5V
126.5V
COMPLAINT
CAUSE
REMEDY
Fan motor will not run.
No power
Check voltage at outlet. Correct if none.
Power supply cord
Rotary switch
Check voltage to rotary switch. If none, check
power supply cord. Replace cord if circuit is open.
Check switch continuity. Refer to wiring diagram
for terminal identification. Replace switch if none
defective.
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.
Will not rotate
Fan blade hitting shroud or blower wheel hitting
scroll. Realign assembly.
Units using slinger ring condenser fans must
have 2/9 to 1/4 inch clearance to the base. If it is
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.
—21—
COMPLAINT
CAUSE
REMEDY
Fan motor noise.
Fan
If cracked, out of balance, or partially missing,
replace it.
Blower
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.
Compressor will not run,
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 the wires are disconnected,
refer to wiring diagram for identification, and replace
the wires. Check the wire connections ; if not
according to the wiring diagram, correct the
connections.
Rotary
Check for continuity, refer to the wiring diagram for
terminal identification. Replace the switch if the
circuit is open.
Thermostat
Check the position of knob. If not at the coldest
setting, advance the knob to this setting and restart
the unit.
Check the continuity of the thermostat. Replace the
thermostat if the circuit is open.
Capacitor (Discharge
capacitor before
servicing.)
Check the capacitor.
Replace if not within ±10% of manufacturer's rating,
replace if shorted, open, or damaged.
Compressor
Overload
Check the compressor for open circuit or graond. If
open or grounded, replace the compressor.
Check the compressor overload if externally
mounted.
Replace if open. (If the compressor temperature is
high, remove the overload, cool and retest.)
Compressor cycles on
overload.
Voltage
Check the voltage. See the limits on the preceding
page. If voltage is not within these 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.)
—22—
COMPLAINT
CAUSE
Fan motor
REMEDY
Compressor cycles on
overload
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 re-assembling.
Condenser fins
(damaged)
If the 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 the capacitor.
Wiring
Check the terminals. If loose, repair or replace.
Check the system for a restriction.
If restricted, clean or replace.
Close if open.
Refrigeration system
Air filter
Insufficient cooling
Excessive noise
Exhaust damper door
Unit undersized
Determine if the unit is properly sized for the area to
be cooled.
Blower or fan
Copper tubing
Check the set screw, or clamp. If loose or missing,
correct. If the blower or fan is hitting scroll or barrier,
rearrange the air handling parts.
Remove the cabinet and carefully rearrange the
tubing not to contact the cabinet, compressor,
shroud and barrier.
—23—
5. SCHEMATIC DIAGRAM
• CIRCUIT DIAGRAM
• MODEL : ZQ08A10C
POWER INPUT
1
2
BK(BR)
WH(BL)
(Plain)
(Ribbed)
8
ROTARY SWITCH
GN(GN/YL)
7
1
8
6
4
2
L
RD
BK
BL
RD
H
M
BK
4
BL
MOTOR
GN(GN/YL)
OR(BR)
YL
CAPACITOR
F
YL
OR(BR)
C
6
7
BK
RD
BK
RD
BL
R
C
3
9
5
H
COMP.
S
BR(YL) BL
BK
OLP
THERMOSTAT
RD
P.T.C
WIRING DIAGRAM
3854AR3563A
PART NO.
LOCATION
NO.
Q'TY
DESCRIPTION
REMARKS
PER SET
ZQ08A10C
2H00677P
1
2
3
4
5
6
7
8
9
POWER CORD ASS'Y
MOTOR ASS'Y
1
1
1
1
1
1
1
1
1
4681A20073A
5416A20014B
2H00598E
COMPRESSOR
ROTARY SWITCH
THERMOSTAT
2H01109L
CAPACITOR, SH
6120AR2359F
6631AR3843N
6631AR2687A
6750A30001N
CONNECTOR ASS'Y
CONNECTOR ASS'Y
OVERLOAD PROTECTOR
—24—
6. EXPLODED VIEW
—25—
7. REPLACEMENT PARTS LIST
• MODEL: ZQ08A10C
PART NO.
ZQ08A10C
LOCATION
NO
FRIEDRICH
PART NO.
Q'TY
DESCRIPTION
REMARK
.
PER SET
A
1
FRONT GRILLE ASSY
FRONT GRILLE
INLET GRILLE
3531A20034C
3530A10026A
3530A10028A
5231A20004A
4758A20002A
4758A30008A
3091A30005C
1
1
1
1
1
2
1
R
R
R
R
R
R
R
673-044-02
673-061-01
2
3
AIR FILTER ASSY
LOUVER, HORIZONTAL
VERTICAL LOUVER
CABINET ASSY
COMP & ACCESSORY ASSY
ANTI-VIBRATION BUSH
COMPRESSOR
BRACKET, WASHER
HEXAGON NUTS
GASKET
4
5
673-062-50
673-019-00
6
B
7
5040AR4195A
5416A20014B
4810AR4155A
1NHA0801206
4986A30001A
6750A30001N
4970A30009A
3550A30048A
4H01058A
3
1
3
3
1
1
1
1
1
1
1
1
1
1
1
1
1
2
4
1
1
1
2
1
1
1
1
1
R
R
N
N
R
R
R
R
R
R
R
R
R
R
R
R
R
N
N
R
R
R
R
R
R
R
R
R
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
673-017-00
673-015-02
OVERLOAD PROTECTOR
SPRING
673-013-02
673-012-02
673-011-00
673-010-00
TERMINAL COVER
GASKET-NUT
NUT, TERMINAL COVER
BASE PAN WELD ASSY
BARRIER, SINGLE
SCROLL
4H00947A
3041A30011D
4790A10008A
3072A20004A
5238A10006A
4901A30001A
4960A20014A
4681A20073A
4000W4A003A
4H00006D
673-068-00
673-035-02
AIR GUIDE
VENTILATION DAMPER
MOTOR MOUNT
MOTOR ASSY
673-069-01
673-069-00
SCREW
SCREW, TAP
SHROUD
4998A10019A
5900A10008A
5900A20015A
3H02932B
TURBO
FAN
673-025-00
673-039-01
CLAMP SPRING
ORIFICE
4948A30007A
4800A30001A
5421A20061E
5403A20092A
4H02023A
BRACE
EVAPORATOR ASSY
CONDENSER ASSY
RUBBER
673-071-00
—26—
PART NO.
ZQ08A10C
LOCATION
NO
FRIEDRICH
PART NO.
Q'TY
DESCRIPTION
REMARK
.
PER SET
C
CONTROL BOX ASSY
CONTROL BOX, SINGLE
CONTROL PANEL ASSY
KNOB ASSY
4995A20072B
4994A10006B
3721A20037B
4941A30011A
6120AR2359F
4H00442N
1
1
1
2
1
1
1
1
1
1
1
1
1
1
N
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
35
36
37
38
39
40
41
42
43
44
45
46
47
D
CAPACITOR
673-006-00
673-000-00
673-004-02
673-005-01
673-057-01
673-001-00
673-003-02
673-009-01
CAPACITOR CLAMP
POWER CORD ASSY
THERMOSTAT
2H00677P
2H01109L
ROTARY SWITCH
ROCKER SWITCH
CLIP CORD
2H00598E
2H01316C
4H01254A
LEAD WIRE ASSY
CONDUCT ASSY
COVER, CONTROL BOX
PIPE
6631AR2687A
6631AR3843N
3550A30036B
48
49
50
51
52
53
E
SUCTION TUBE ASSY
DISCHARGE TUBE
TUBE FORMED ASSY, EVAP IN
TUBE ASSY, CONDOUT
CAPILLARY
5211A20130M
5211A20708A
5211A20131H
5211AR3399T
5210A30646A
5851A30001G
3127AR3403M
5210AR3196F
4959AR3402A
4959AR3402B
4810AR3240A
1NHC1000006
1BHD1004006
3210AR3337A
4H01029D
1
1
1
1
1
1
1
1
1
1
2
2
2
2
1
1
673-021-03
DRIER ASSY
INSTALL PART ASSY
UPPER GUIDE
54
55
56
57
58
59
60
61
62
673-038-02
673-038-03
673-065-00
673-067-00
673-066-00
673-064-00
673-069-02
673-070-00
CURTAIN ASSY
CURTAIN ASSY
BRACKET, ANGLE
NUT, HEXAGON
BOLT
FRAME GUIDE
WASHER, PLAIN
DRAIN, PIPE
3H02773A
—27—
Use Factory Certified Parts...
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
P/NO.: 3828A20038U
Printed in the U.S.A
ZQ08 (4-04)
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