Daikin VRV IV+ Service Manual page 41

2.3.21 E7-09-21-33 – Fan inverter PCB A4P (integrated power module) overheated
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
1 Perform a check of the fan inverter PCB A7P. See
4
PCB" [ 259].
Possible cause: Faulty fan inverter PCB A7P.
2 Perform a check of the outdoor unit fan motor M2F. See
4
fan motor" [ 307].
Possible cause: Faulty outdoor unit fan motor M2F.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Main error code
E7
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
Fan inverter PCB A4P is
overheated.
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 A4P. See
4
PCB" [ 259].
Possible cause: Faulty fan inverter PCB A4P.
2 Check the required space around the outdoor unit heat exchanger. See
"4.3 External factors" [
Possible cause: Insufficient air flow or air by‑pass due to required space
specifications not met.
3 Clean the outdoor heat exchanger. See "5 Maintenance" [
Possible cause: Dirty outdoor heat exchanger.
4 Perform a check of the liquid cooling expansion valve. See
valve" [ 4 244].
Possible cause: Faulty liquid cooling expansion valve.
Sub error code
09
21
33
Effect
Unit will stop operating.
4
372].
2 Troubleshooting
|
"3.8 Fan inverter
"3.14 Outdoor unit
Unit
Main
Sub 1
Sub 2
Reset
Manual reset via user
interface.
"3.8 Fan inverter
4
374].
"3.7 Expansion
Service manual
41