DC
CN147
THERMISTOR (PIPE TEMP)
BL
AC
K
BL
AC
K
1 2
3 4
1 2
3 4
Heat exchanger liquid temperature
thermistor
Heat exchanger outlet temperature thermistor short or open detected
1. Connector connection defective, open
2. Thermistor failure
3. Main PCB failure
OK
OK
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 Main PCB (DC5.0V)
Main PCB (CN147:1-2) voltage value = 5V
Remove the thermistor from Main PCB, check the voltage.
Heat exchanger outlet temperature thermistor
(CN147:1-2)
If the voltage do not appear, replace Main PCB
, and execute
the check operation again.
If the voltage do not appear,
02-32
Heat Ex. Outlet Temp.
Thermistor Error
Trouble shooting 27
Detective Actuators:
Detective details:
OUTDOOR UNIT Error Method:
Forecast of Cause :
Indicate or Display:
Economy lamp : Continuous flash.
ERROR CODE : [E : 73]
Indoor Unit : Operation lamp: 7 time Flash,
Timer lamp: 3 time Flash
Outdoor unit :
POWER
MODE
ERROR
2
7
(L1)
(L2)
(L6)
(L5)
(L4)
(L3)
3
PUMP
DOWN
LOW
NOISE
PEAK
CUT
