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Troubleshooting
Service manual
137
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
Trigger
Effect
Reset
Inverter PCB A6P detects
open or short circuit or
out of range on fin
thermistor.
Unit will stop operating.
Manual reset via user
interface.
Automatic reset when fin
temperature is within
range.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1
Perform
a
check
of
the
fin
thermistor
of
the
PCB.
See
Possible cause:
Faulty fin thermistor of the PCB.
1
Check the required space around the outdoor unit heat exchanger. See
372].
Possible cause:
Insufficient air flow or air by‑pass due to required space
specifications not met.
2
Perform a check of the liquid cooling expansion valve. See
Possible cause:
Faulty liquid cooling expansion valve.
3
Perform a check of the inverter PCB A6P. See
Possible cause:
Faulty inverter PCB A6P.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
2.3.125 P8-00 – Freeze-up during refrigerant auto-charge
Trigger
Effect
Reset
Very low temperatures
detected on indoor unit
coil during refrigerant
auto‑charge.
Auto-charge operation
will terminate.
Push BS3 (return) button
once.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1
Check for objects near the indoor unit that may block the airflow. See
372].
Possible cause:
Airflow of the indoor unit is blocked.
2
Clean the air filters of the indoor unit(s). See service manual of the respective
indoor unit(s).
Possible cause:
Faulty or clogged air filter.
Summary of Contents for VRV IV+
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