Heat Sink Thermistor Error
OK
OK
P700
THERMISTOR (HEAT SINK)
BLACK
BLACK
3
2
1
3
2
1
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.
02-27
Trouble shooting 26
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
L6
L5
L4
L3
2
7
7
DC
