Friedrich Air Conditioner ZQ08A10C User Manual

Room Air Conditioner  
Service and Parts  
Manual  
TM  
ZStar  
ZQ08 (4-04)  
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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—  
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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—  
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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—  
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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—  
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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—  
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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—  
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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—  
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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—  
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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—  
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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—  
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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—  
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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—  
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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—  
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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—  
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4. TROUBLESHOOTING GUIDE  
4.1 OUTSIDE DIMENSIONS  
525mm(20 11/16")  
470mm(18 1/2")  
250mm(10")  
17—  
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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—  
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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—  
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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—  
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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—  
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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—  
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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—  
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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—  
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6. EXPLODED VIEW  
25—  
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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—  
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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—  
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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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