4
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Components
Service manual
50
RXM20~71R(9) + ARXM25~71R(9) + FTXM20~71R + ATXM25~50R +
FVXM25~50A
Split New Perfera R32
ESIE20-11B – 2022.02
Is the measured value correct?
Action
No
Replace the 4‑way valve coil, see
When outdoor temperature is mild and unit can switch between heating and
cooling
INFORMATION
This procedure is ONLY possible when the outdoor temperature is within the
temperature range for both
Heating
and
Cooling
operation mode. See the
databook on Business Portal for the temperature range of the operation modes.
1
Connect the 4‑way valve connector to the appropriate PCB.
2
Turn ON the power using the respective circuit breaker.
3
Activate
Heating
operation via the user interface.
4
With the 4‑way valve connector connected to the PCB, measure the voltage
on the 4‑way valve connection of the PCB.
Result:
The measured voltage MUST be:
Class
Voltage
Class 20~35
12 V DC
Class 42~71
220~240 V AC
5
De-activate
Heating
and activate
Cooling
operation via the user interface.
6
Measure the voltage on the 4‑way valve connection on the PCB.
Result:
The measured voltage MUST be:
Class
Voltage
Class 20~35
0 V DC
Class 42~71
0 V AC
Are the measured voltages correct?
Action
Yes
Perform a position check of the 4-way
valve, see
49].
No
Perform a check the main PCB, see
125].
When outdoor temperature does not allow the unit to run in cooling or heating
mode
INFORMATION
Follow this procedure when the outdoor temperature is outside the temperature
range for one of the operation modes (
Heating
or
Cooling
). The unit CANNOT
operate in the mode for which the outdoor temperature is outside its temperature
range. See the databook on Business Portal for the temperature range of the
operation modes.
1
Connect the 4‑way valve connector to the appropriate PCB.
2
Turn ON the power using the respective circuit breaker.
3
With the unit operating, connect the service monitoring tool to the unit and
check whether the unit is operating in
Heating
or
Cooling
mode.
