Daikin VRV IV+ Service Manual page 77

2.3.53 H7-21-23-25 – Defective fan inverter PCB A7P
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
1 Perform a check of the outdoor unit fan motor M2F. See
4
fan motor" [ 307].
Possible cause: Faulty outdoor unit fan motor M2F.
2 Perform a check of the fan inverter PCB A7P. See
4
PCB" [ 259].
Possible cause: Faulty fan inverter PCB A7P.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Main error code
H7
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
Abnormal current form
detected by fan inverter
PCB during start-up of fan
motor.
INFORMATION
It is recommended to perform the checks in the listed order.
1 Perform a check of the outdoor unit fan motor M2F. See
4
fan motor" [ 307].
Possible cause: Faulty outdoor unit fan motor M2F.
2 Perform a check of the fan inverter PCB A7P. See
4
PCB" [ 259].
Possible cause: Faulty fan inverter PCB A7P.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Sub error code
01
05
09
Effect
Unit will stop operating.
2 Troubleshooting
|
"3.14 Outdoor unit
"3.8 Fan inverter
Unit
Main
Sub 1
Sub 2
Reset
Power reset at outdoor
unit.
"3.14 Outdoor unit
"3.8 Fan inverter
Service manual
77