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Troubleshooting
Service manual
42
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
2.3.22 E7-10-22-34 – Fan inverter PCB A7P (integrated power module) overheated
Main error code
Sub error code
Unit
E7
10
Main
22
Sub 1
34
Sub 2
INFORMATION
Main, Sub 1 and Sub 2 indications are relevant in multiple outdoor unit
configurations. Main outdoor unit is the unit to which F1‑F2 IN transmission line is
connected. Main, Sub 1 and Sub 2 outdoor units can be identified by field setting
1‑00.
Trigger
Effect
Reset
Fan inverter PCB A7P is
overheated.
Unit will stop operating.
Manual reset via user
interface.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1
Perform a check of the fan inverter PCB A7P. See
259].
Possible cause:
Faulty fan inverter PCB A7P.
2
Check the required space around the outdoor unit heat exchanger. See
Possible cause:
Insufficient air flow or air by‑pass due to required space
specifications not met.
3
Clean the outdoor heat exchanger. See
Possible cause:
Dirty outdoor heat exchanger.
4
Perform a check of the liquid cooling expansion valve. See
244].
Possible cause:
Faulty liquid cooling expansion valve.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Summary of Contents for VRV IV+
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