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Troubleshooting
Service manual
107
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
Main PCB detects voltage/
current errors on output
waveform or current
read-out.
Unit will stop operating.
Manual reset via user
interface.
Power reset at outdoor
unit.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1
Perform a check of the main PCB. See
290].
Possible cause:
Faulty main PCB or wrong capacity setting.
2
Perform a check of the inverter PCB A6P. See
Possible cause:
Faulty inverter PCB A6P or non‑compatible inverter PCB.
3
Perform a check of the compressor. See
221].
Possible cause:
Faulty compressor.
4
Check if the power supply is conform with the regulations. See
Possible cause:
▪
Faulty or disturbance of the power supply (imbalance >10%),
▪
Power drop,
▪
Short circuit.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
2.3.92 L1-28-32-34 – Fan inverter PCB A4P Eeprom error
Main error code
Sub error code
Unit
L1
28
Main
32
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.
Summary of Contents for VRV IV+
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