49
Indication
Abnormal point Detecting method
Symptom: Outdoor unit operates.
Check points
LED 1
(Red)
• Check the characteristic of the defrost
temperature thermistor.
• Check the connector. (CN661)
Service mode
Lighting
5 times
11 times
9 times
Lighting
Lighting
Defrost thermistor
Initial-setting
When the unit operates EMERGENCY OPERATION.
When a short or open circuit occurs in the defrost thermistor during
heating.
LED 2
(Yellow)
Indication
Abnormal point Detecting method
Symptom: Outdoor unit operates (The compressor operates at reduced frequency)
Check points
LED 1
(Red)
These symptoms do not mean any
abnormality of the product, but check
the following points.
• Air filter clogging
• Amount of gas
• Short cycle of indoor/outdoor air flow
Once Lighting Current protection
When the outdoor unit input current exceeds 14.5A.
Twice Lighting
High-pressure protection
When the indoor gas pipe temperature exceeds 55
˚C
during heating.
Twice Lighting Defrosting in cooling
When the indoor gas pipe temperature falls to 6˚C or below during cooling.
3 times Lighting
Discharge temperature
protection
When the discharge temperature exceeds 104
˚C
.
4 times Lighting
Low discharge
temperature protection
When the state with low discharge temperature of which 37
˚C
or below
in COOL and 35
˚C
or below in HEAT lasts for 20 minutes.
5 times Lighting
High-pressure protection
When outdoor heat exchanger temperature thermistor detects 58: or
more.
LED 2
(Yellow)
When the initial-setting information from an indoor unit is now being read.
OC304A --2qxp 04.6.29 8:34 AM Page 49
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