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Troubleshooting
Service manual
76
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
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
Abnormal current form
detected by fan inverter
PCB during start-up of fan
motor.
Unit will stop operating.
Power reset at outdoor
unit.
INFORMATION
It is recommended to perform the checks in the listed order.
1
Perform a check of the outdoor unit fan motor M1F. See
Possible cause:
Faulty outdoor unit fan motor M1F.
2
Perform a check of the fan inverter PCB A4P. See
259].
Possible cause:
Faulty fan inverter PCB A4P.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
2.3.52 H7-02-06-10 – Defective fan inverter PCB A7P
Main error code
Sub error code
Unit
H7
01
Main
05
Sub 1
09
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
Abnormal current form
detected by fan inverter
PCB during start-up of fan
motor.
Unit will stop operating.
Power reset at outdoor
unit.
INFORMATION
It is recommended to perform the checks in the listed order.
Summary of Contents for VRV IV+
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