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Troubleshooting
Service manual
65
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
2.3.41 F4-09-11-13 – Wet operation error for compressor M2C
Main error code
Sub error code
Unit
F4
09
Main
11
Sub 1
13
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
Discharge superheat
<10˚C for 90 minutes
(SH
Discharge
=T
Discharge
−
T
condensation
).
Unit will stop.
Manual reset via user
interface.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1
Perform
a
check
of
the
suction
pipe
thermistor.
See
348].
Possible cause:
Faulty suction pipe thermistor or connector fault.
2
Perform
a
check
of
the
discharge
pipe
thermistor.
See
348].
Possible cause:
Faulty discharge pipe thermistor or connector fault.
3
Perform a check of the refrigerant high pressure sensor. See
Possible cause:
Faulty refrigerant high pressure sensor.
4
Check if the refrigerant circuit is correctly charged. See
Possible cause:
Refrigerant overcharge.
5
Check for the presence of non‑condensables and/or humidity in the
refrigerant circuit. See
363].
Possible cause:
Non‑condensables and/or humidity in the refrigerant circuit.
6
Perform a check of the evaporator side expansion valve. See
Possible cause:
Faulty evaporator side expansion valve.
7
Check for objects near the indoor unit that may block the airflow. See
372].
Possible cause:
Airflow of the indoor unit is blocked.
8
Clean the air filters of the indoor unit(s). See service manual of the respective
indoor unit(s).
Summary of Contents for VRV IV+
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