Panasonic CS-PE9CKE / CU-PE9CKE / CS-PE12CKE / CU-PE12CKE Service Manual ▷ View online
Refrigeration cycle system
In order to diagnose malfunctions, make sure that there are no
electrical problems before inspecting the refrigeration cycle.
electrical problems before inspecting the refrigeration cycle.
Such problems include insufficient insulation, problem with the
power source, malfunction of compressor or fan.
power source, malfunction of compressor or fan.
The normal outlet air temperature and pressure of the
refrigeration cycle depends on various conditions, the standard
values for them are shown in the table to the right.
refrigeration cycle depends on various conditions, the standard
values for them are shown in the table to the right.
11 Trouble-shooting guide
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CS-PE9CKE / CU-PE9CKE / CS-PE12CKE / CU-PE12CKE
11.1. Relationship between the condition of air conditioner and pressure
and electric current
Cooling mode
Heating mode
Condition of the air
conditioner
Low Pressure
High Pressure
Electric current
during operation
Low Pressure
High Pressure
Electric current
during operation
Insufficient refrigerant
(gas leakage)
Clogged capillary tube
Short circuit in the
indoor unit
Heat radiation deficiency
of the outdoor unit
Insufficient compression
11.2. Diagnosis methods of a malfunction of a compressor and a 4-way
valve
Nature of fault
Symptom
O Electric current during operation becomes approximately 80% lower than the normal level.
Insufficient compressing of a compressor
O The discharge tube of the compressor becomes abnormally hot (normally 70~90°C).
O The difference between high pressure and low pressure becomes almost zero.
O Electric current reaches a high level abnormally, and the value exceeds the limit of an ammeter.
In some cases, a breaker turns off.
In some cases, a breaker turns off.
Locked compressor
O The compressor has a humming sound.
O Electric current during operation becomes approximately 20% lower than the normal valve.
Inefficient switches of the 4-way valves
O The temperature difference between from the discharge tube to the 4-way valve and from
suction tube to the 4-way valve becomes almost zero.
suction tube to the 4-way valve becomes almost zero.
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12 Technical Data
Q
Q
Q
Q Operating characteristics
CS/CU-PE9CKE
CS/CU-PE12CKE
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13 Exploded View
CS-PE9CKE/CS-PE12CKE
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CS-PE9CKE / CU-PE9CKE / CS-PE12CKE / CU-PE12CKE
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