section 11: fault finding
Page 58
figure 11-5:
Voltage of pump on the Main PCB
figure 11-6:
Resistance of the 4way valve coil
figure 11-7:
Resistance of the defrost heater
figure 11-8:
Continuity of current fuse on the Main PCB
figure 11-9:
Resistance of the compressor overheat protection
relay
figure 11-10:
Voltage of humidity sensor
Between white and black
Between brown and black
Between red and black ,approx. DC15V
Main PCB is normal
W
B
R
BR
BL
13
Fuse CF2
(250V T5A)
0Ω
Pump
Main
PCB
[HPID12R32]
Measure voltage between the connector pins of connector
13
.
Connector
13
shall be checked during heating operation.
Measure voltage as follows without taking off the connector
13
.
Pump (HPID12R32)
8
4-way valve coil
Main
(PCB
Take off the connector and check the resistance 4way valve coil.
[HPID12R32]
9
260~300Ω
Main
PCB
[HPID12R32]
PCB
(Main)
Fuse CF2
(250V T5A)
[HPID12R32]
0Ω
OHR
0.147~9.80V
17
18
Humidity
Sensor
COM
Summary of Contents for Aerona3 HPID12R32
Page 71: ...NOTES Notes Page 71...
