4 | Third party components
Service manual
202
RXM20~71R + ARXM25~71R + FTXM20~71R + ATXM25~50R +
FVXM25~50A
Split New Perfera R32
ESIE20-11 – 2021.01
4 Third party components
4.1 Electrical circuit
4.1.1 Checking procedures
To check the power supply of the unit
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see "3.14Plate work"[4151].
1 Check that the power supply cables and earth connection are firmly fixed to
the power supply terminal X1M.
2 Measure the insulation resistance between each power supply terminal and
the ground using a megger device of 500 V DC. All measurements MUST be
>1MΩ. If insulation resistance is <1MΩ, earth leakage is present.
3 Turn ON the power using the respective circuit breaker.
4 Measure the voltage between L and N on the power supply terminal X1M.
Result: The voltage MUST be 230VAC ± 10%.
5 Unbalance between the phases MUST NOT exceed 2%.
Is the measured voltage (power supply)
correct?
Action
Yes Return to the troubleshooting of the
specific error and continue with the
next procedure.
No Adjust the power supply, see "Repair
procedures"[4203].
To check the power supply to the indoor unit
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
1 Remove the required plate work, see "3.14Plate work"[4151].
2 Check that the power supply cables and earth connection are firmly fixed to
the indoor unit power supply terminal X1M.
3 Turn ON the power using the respective circuit breaker.
4 Measure the voltage between L and N on the indoor unit power supply
terminal X1M.
Result: The voltage MUST be 230VAC ± 10%.
Is the measured voltage (power supply)
correct?
Action
Yes Return to the troubleshooting of the
specific error and continue with the
next procedure.
No Continue with the next step.
5 Check the power supply to the unit, see "Checking procedures"[4202].
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