Heat Sink Thermistor Error
OK
OK
DC
P700
THERMISTOR
(HEAT SINK)
BLACK
BLACK
321
321
Heat sink temperature thermistor
Heat sink temperature thermistor short or open detected
Check Point 1 : Check the connector connection and cable open
Connector connection state check
Cable open check
Check Point 2 : Check the thermistor
Thermistor characteristics check
(Disconnect the thermistor from the PCB and check.)
* For the thermistor characteristics, refer to the "Service Parts Information 8".
Check Point 3 : Check voltage of Inverter PCB (DC5.0V)
Main PCB P700:1-3 voltage value =5V
Remove the thermistor from Inverter PCB, check the voltage.
If the voltage does not appear, replace Inverter PCB,
and execute the check operation again.
02-26
Trouble shooting 25
Detective Actuators: Detective details:
OUTDOOR UNIT Error Method:
Indicate or Display:
Error code : 77
1. Connector connection failure, open
2. Thermistor failure
3. Inverter PCB failure
Forecast of Cause :
Outdoor unit :
n
: n times blinking
: Light ON: Light OFF
Mode Error L1 L2 L6L5L4L3
2 7
7
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