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11.1.1. Relationship between the condition of the air conditioner and pressure and
electric current
Cooling Mode
Heating Mode
Condition of the air
conditoner
Low Pressure
High Pressure
Electric current
during operation
Low Pressure
High Pressure
Electric current
during operation
Insufficient refrigerant
(gas leakage)
Clogged capillary tube
or Strainer
Short circuit in the
indoor unit
Heat radiation
deficiency of the
outdoor unit
Inefficient compression
•
Carry out the measurements of pressure, electric current, and temperature fifteen minutes after an operation is started.
11.1.2. Diagnosis methods of a malfunction of a compressor and 4-way valve
Nature of fault
Symptom
•
Electric current during operation becomes approximately 20% lower than the normal value.
Insufficient compressing of a compressor
•
The discharge tube of the compressor becomes abnormally hot (normally 70 to 90°C).
•
The difference between high pressure and low pressure becomes almost zero.
•
Electric current reaches a high level abnormally, and the value exceeds the limit of an
ammeter. In some cases, a breaker turns off.
Locked compressor
•
The compressor is a humming sound.
•
Electric current during operation becomes approximately 80% lower than the normal value.
Insufficient switches of the 4-way valve
•
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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CS-A12ATP5 CU-A12ATP5 / CS-A18ATP5 CU-A18ATPT5 / CS-A24ATP5 CU-A24ATPT5
Summary of Contents for CS-A12ATP5
Page 11: ...3 Dimensions 11 CS A12ATP5 CU A12ATP5 CS A18ATP5 CU A18ATPT5 CS A24ATP5 CU A24ATPT5 ...
Page 12: ...12 CS A12ATP5 CU A12ATP5 CS A18ATP5 CU A18ATPT5 CS A24ATP5 CU A24ATPT5 ...
Page 14: ...5 Block Diagram 14 CS A12ATP5 CU A12ATP5 CS A18ATP5 CU A18ATPT5 CS A24ATP5 CU A24ATPT5 ...
Page 15: ...15 CS A12ATP5 CU A12ATP5 CS A18ATP5 CU A18ATPT5 CS A24ATP5 CU A24ATPT5 ...
Page 16: ...6 Wiring Diagram 16 CS A12ATP5 CU A12ATP5 CS A18ATP5 CU A18ATPT5 CS A24ATP5 CU A24ATPT5 ...
Page 17: ...17 CS A12ATP5 CU A12ATP5 CS A18ATP5 CU A18ATPT5 CS A24ATP5 CU A24ATPT5 ...
Page 39: ...12 Technical Data 39 CS A12ATP5 CU A12ATP5 CS A18ATP5 CU A18ATPT5 CS A24ATP5 CU A24ATPT5 ...
Page 42: ...13 Exploded View 42 CS A12ATP5 CU A12ATP5 CS A18ATP5 CU A18ATPT5 CS A24ATP5 CU A24ATPT5 ...
Page 44: ...15 Exploded View 44 CS A12ATP5 CU A12ATP5 CS A18ATP5 CU A18ATPT5 CS A24ATP5 CU A24ATPT5 ...
Page 54: ...18 1 REMOTE CONTROL 54 CS A12ATP5 CU A12ATP5 CS A18ATP5 CU A18ATPT5 CS A24ATP5 CU A24ATPT5 ...