Troubleshooting
SiBE811001EB
177
CONVENI-PACK
Troubleshooting
Caution
Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged.
NO
YES
Replace the electronic
expansion valve main body.
NO
NO
NO
YES
YES
Shut the power supply OFF after
connection and then restart.
Replace the coil of electronic
expansion valve.
Replace the relay cables.
When power is supplied.
Electronic
expansion valve is
connected to X7A of
indoor unit PCB.
Coil check (
∗
1)
of electronic
expansion valve
drive indicates
normal.
Relay cables short
circuit or
disconnected.
YES
∗
1. How to check the coil of electronic expansion valve drive
Remove the connector for electronic expansion valve (X7A) from PCB. Measure the resistance value
between pins and check the continuity to judge the condition.
White (1)
Red (5)
Orange (3)
φ
1
φ
3
M
φ
2
φ
4
Yellow
(2)
Brown
(6)
Blue
(4)
1) White
2) Yellow
3) Orange
4) Blue
5) Red
6) Brown
When restarting the operation
after shutting the power supply
OFF does not work, replace the
indoor unit PCB.
The normal products will show the following conditions:
(1) No continuity between (1) and (2)
(2) Resistance value between (1) and (3) is approx. 300
Ω
(3) Resistance value between (1) and (5) is approx. 150
Ω
(4) Resistance value between (2) and (4) is approx. 300
Ω
(5) Resistance value between (2) and (6) is approx. 150
Ω