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Troubleshooting
Service manual
132
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
Trigger
Effect
Reset
Inverter PCB A3P detects
power unbalance >4%.
Unit will stop operating.
Manual reset via user
interface.
Automatic reset.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1
Check if the power supply is conform with the regulations. See
356].
Possible cause:
▪
Faulty or disturbance of the power supply (imbalance >10%),
▪
Power drop,
▪
Short circuit.
2
Perform a check of the inverter PCB A3P. See
274].
Possible cause:
Faulty inverter PCB A3P.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
2.3.119 P1-07-08-09 – Open phase or unbalanced power supply detection by inverter PCB A6P
Main error code
Sub error code
Unit
P1
07
Main
08
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
Inverter PCB A6P detects
power unbalance >4%.
Unit will stop operating.
Manual reset via user
interface.
Automatic reset.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1
Check if the power supply is conform with the regulations. See
356].
Summary of Contents for VRV IV+
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