[ VII Troubleshooting ]
- 19 -
HWE1706A GB
2. DC fan motor (fan motor/indoor control board)
1. CAUTION
♦A high voltage is applied to the connector for connection to the fan motor (CNMF1).
♦Do not unplug the connector CNMF1 with the unit energized to avoid damage to the indoor control board and fan motor.
2. Troubleshooting
♦Symptom: Indoor unit fan does not run.
Fix the connection.
Yes
No
Replace the indoor control board.
Yes
No
Check the power supply.
Measure the voltage at the indoor control board.
[Values for Vsp are the values that are measured with the fan motor in operation.
Vsp is 0 V when the fan motor is stopped.]
Power supply voltage
V
DC
V
DC
310 - 340 VDC (same with the voltage between fan connector 1 (+) and 4(-))
V
CC
15 VDC (same with the voltage between fan connector 5 (+) and 4(-))
V
SP
1 - 6.5 VDC (same with the voltage between fan connector 6 (+) and 4(-))
Replace the indoor control board.
Yes
No
Replace the motor.
Check fan motor connector contact
(CNMF1).
Is the fan motor connector
(CNMF1) fully inserted?
Is the voltage within the
normal range?
Are 0 VDC and 15 VDC
displayed alternately?
Check the fan motor position thermistor signal.
Get the motor to make a full rotation or more, and measure the voltage at the test point
V
FG
.
(same with the voltage between fan connector 7 (+) and 4(-))
220 VAC
230 VAC
240 VAC
311 VDC
325 VDC
340 VDC
HWE1706A.book 19 ページ ２０２０年６月２９日 月曜日 午後１時５６分
To Next Page
Loading...
Need help?
General
