Service manual

34
Primary current protection
Secondary current protection
High-pressure protection
Defrosting in cooling
3 times
Lighting
Discharge temperature
protection
• Check refrigerant circuit and refrigerant amount.
• Refer to 11-6.D "Check of LEV".
• Refer to 11-6.F "Check of outdoor thermistors".
4 times
Lighting
Low discharge temperature
protection
• Refer to 11-6.D "Check of LEV".
• Check refrigerant circuit and refrigerant amount.
5 times
Lighting
Cooling high-pressure protection
This symptom does not mean any abnormality of the product,
but check the following points.
• Check if indoor filters are clogged.
• Check if refrigerant is short.
• Check if indoor/outdoor unit air circulation is short cycled.
-
-
These symptoms do not mean any abnormality of the product,
but check the following points.
• Check if indoor filters are clogged.
• Check if refrigerant is short.
• Check if indoor/outdoor unit air circulation is short cycled.
Twice Lighting
Once Lighting
The discharge temperature exceeds 100: during operation.
The frequency of the compressor is kept 80Hz or more and the discharge
temperature is kept under 39: for more than 20 minutes.
The outdoor heat exchanger temperature exceeds 58: during operation.
9 times
Lighting
Inverter check mode
Lighting
Lighting
Normal
The unit is operated with emergency operation switch.
-
The input current exceeds 15A.
The current of the compressor exceeds 15A.
The indoor gas pipe temperature exceeds 45: during heating.
The indoor gas pipe temperature falls 3: or below during cooling.
LED1(Red) LED2(Yellow)
Abnormal point / Condition Correspondence
Indication
Condition
Outdoor unit
operates.
Outdoor unit
operates
No.
Symptom
20
21
22
23
24
25
26
OB389F--2qxp 07.9.3 5:08 PM Page 34