Panasonic CS-PA7KKD / CS-PA9KKD / CS-PA12KKD / CS-PA16KKD / CU-PA7KKD / CU-PA9KKD / CU-PA12KKD / CU-PA16KKD Service Manual ▷ View online
33
13.2 Relationship between the condition of the air conditioner and pressure
and electric current
Cooling Mode
Heating Mode
Condition of the
air conditioner
air conditioner
Low Pressure
High
Pressure
Pressure
Electric current
during
operation
during
operation
Low Pressure
High
Pressure
Pressure
Electric current
during operation
during operation
Insufficient
refrigerant (gas
leakage)
refrigerant (gas
leakage)
Ô
Ô
Ô
Ô
Ô
Ô
Clogged capillary
tube or strainer
tube or strainer
Ô
Ô
Ô
Ô
Ô
Ô
Short circuit in the
indoor unit
indoor unit
Ô
Ô
Ô
Ò
Ò
Ò
Heat radiation
deficiency of the
outdoor unit
deficiency of the
outdoor unit
Ò
Ò
Ò
Ô
Ô
Ô
Inefficient
compression
compression
Ò
Ô
Ô
Ò
Ô
Ô
• Carry out the measurement of pressure, electric current, and temperature fifteen minutes after an operation is
started.
started.
13.3 Diagnosis methods of a malfunction of a compressor
Nature of fault
Symptom
Insufficient compressing
of a compressor
z
Electric current during operation becomes approximately 20% lower thank the normal value.
z
The discharge tube of the compressor becomes abnormally hot (normally 70℃ to 90℃ )
z
The different between high pressure and low pressure becomes almost zero.
Locked compressor
z
Electric current reaches a high level abnormally, and the value exceeds the limit of an ammeter. In
some cases, a breaker turns off.
z
Then compressor has a humming sound.
Insufficient switches of
the 4-way valve
z
Electric current during operation becomes approximately 80% lower than the normal value.
z
The temperature different between from the discharge tube to the 4-way valve and from suction tube
to the 4-way valve becomes almost zero.
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WARNING
14. Disassembly and Assembly Instructions
High Voltage is generated in the electrical parts area by the capacitor. Ensure that the capacitor has discharged
sufficiently before proceeding with repair work. Failure to heed this caution may result in electric shocks.
1. Open the intake grille and pull it to the horizontal position.
2. Pull up the intake grille until it falls off.
1. Remove the two caps at the discharge port (right and left) and then release the two screws on both sides.
2. Pull out the front grille form the unit body.
2. Pull out the front grille form the unit body.
Removal Procedure for Intake Grille
Removal Procedure for Front Grille
Cap
Screw
Front grille
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1. Separate the drain hose and the drain plate. 2. Pull out the discharge grille slightly.
1. Release fixing screws on both side, disassembly the fixing board from evaporator on the left side and pull out the
whole evaporator.
2. Loose the fixing screw of the cross flow fan.
3. After removing the bearing, indoor fan can be taken out from the left side
4. Lift up the indoor fan slightly, and then pull the fan motor out.
Removal Procedure for Discharge Grille
Removal Procedure for Cross Flow Fan
Fixing Screw
Bearing
Fan motor
36
15. Exploded View and Replacement Pars List
15.1 Indoor Unit
Note
The above exploded view is for the purpose of parts disassembly and replacement.
The non-numbered parts are not kept as standard service parts.
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