56
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)
Lighting
9 times
Service mode
Lighting
5 times
Defrost thermistor
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 indoor gas pipe temperature exceeds 55˚C during heating.
Twice
Lighting Defrosting in cooling
When 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)
Indication
Abnormal point
Detecting method
Symptom: It is repeated that outdoor unit stops and restarts 3 minutes later
Check points
LED 1
(Red)
5 times Goes out High-pressure protection
When outdoor heat exchanger temperature thermistor detects 69
:
or
more.
When high-pressure switch detects 4MPa or more.
4 times Goes out P.C. board temperature
overheat protection
When the P.C. board temperature thermistor detects 70
:
or above.
• Check the outdoor unit air passage.
• Check the outdoor fan motor.
• Replace the outdoor electronic control
P.C. board.
• Check the outdoor unit air passage.
• Check the outdoor fan motor.
8 times Goes out
Power factor control
module protection
When the overcurrent to power factor controller occurs or the output
voltage from power factor controller becomes 400V or more.
• Check the input voltage.
• Check the inverter.
9 times Goes out DC voltage protection
When it's detected that DC voltage becomes 200V or less, or reaches
400V or more.
• Check the voltage of power supply.
• Check the inverter.
13 times Goes out Fan motor protection
When fan motor current is 2A or more, or when the abnormality is
detected in the feedback signal from fan motor.
• Check the outdoor fan motor.
• Check the fan motor connector.
LED 2
(Yellow)
OB319--2.qxp 03.12.3 0:56 PM Page 56
