Daikin FTXA20AW - 3 Third Party Components; Electrical Circuit; Checking Procedures

3 | Third party components
Service manual
156
FTXA20~50A(W)(S)(T) + FTXA20~50B(B)(S)(T) + RXA42+50A +
RXA20~35A(9) + RXA42+50B
Split Stylish R32
ESIE18-03D – 2021.05
3 Third party components
3.1 Electrical circuit
3.1.1 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 "2.14Plate work"[4120].
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 230VAC ± 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
"3.1.2Repair procedures"[4157].
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 "2.14Plate work"[4120].
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 230VAC ± 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 "3.1.1Checking procedures"[4156].