SiBE341027
Troubleshooting by Remote Controller
Service Diagnosis
125
Troubleshooting
Note:
*1. Check the procedure for fan motor connector
(1) Power OFF the fan motor.
(2) Remove the connector (X2A or X4A) on the PCB to measure the following resistance
value.
Judgement criteria: resistance value between each phase is within ±20%
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Check the fan motor corresponding to the error code “
H7
” in
the monitor mode.
When confirmation of error 3 shows as follows:
→
Fan motor 1 (M1F)
When confirmation of error 3 shows as follows:
→
Fan motor (M2F)
Explanation for “ ”
Master unit
Slave unit 1
Slave unit 2
System
Turn OFF the power supply.
Is the
signal wire connector
for the corresponding
fan motor normal?
Check the connector
of the fan motor (*1).
Are the
resistance of the fan motor lead
wire between Vcc and UVW and
between GND and UVW
balanced?
NO
Ensure correct connection.
YES
NO
YES
Replace the fan motor.
Replace the INV. PCB.
z
For fan motor 1: replace the
INV. PCB (A5P)
z
For fan motor 2: replace the fan
INV. PCB (A7P)
Connector
for signal wires (X2A or X4A)
X2A
5 Gray
4 Pink
3 Orange
2 Blue
1 Yellow
5 Gray
GND
Vcc
W
V
U
Measure the
resistance
between Vcc-
UVW and
GND-UVW.
Measure the
resistance
between Vcc-
UVW and
GND-UVW.
