5 | Third party components
Service manual
60
RXJ20~50A + FTXJ-A(W)(S)(B)
Split Emura 3 R32
ESIE22-04 – 2022.04
5 Third party components
5.1 Electrical circuit
5.1.1 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 "4.1Plate work"[448].
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 of the unit.
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
"5.1.2Repair procedures"[461].
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 "4.1Plate work"[448].
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 "5.1.1Checking procedures"[460].
draft–22/04/2022 08:50
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