2
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Troubleshooting
Service manual
99
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
2.3.82 L1-01-07-11 – Inverter PCB A3P abnormality
Main error code
Sub error code
Unit
L1
01
Main
07
Sub 1
11
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
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 A3P. See
Possible cause:
Faulty inverter PCB A3P 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.
2.3.83 L1-02-08-12 – Inverter PCB A3P current detection primary circuit
Main error code
Sub error code
Unit
L1
02
Main
08
Sub 1
12
Sub 2
Summary of Contents for VRV IV+
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