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Third party components
Service manual
356
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
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 central controller.
Prerequisite:
Turn OFF the respective circuit breaker.
Prerequisite:
Remove the required plate work, see
315].
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 the phases L1‑L2‑L3 on the power supply
terminal X1M. The voltage MUST be 400 V AC ± 10%.
5
Measure the voltage between each phase and N on the power supply terminal
X1M. The voltage MUST be 230 V AC ± 10%.
6
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
361].
To check if the power supply is conform with the regulations
1
Check that the power source is in line with the requirements described in the
databook.
Is the power supply conform with the
regulations?
Action
Yes
Return to the troubleshooting of the
specific error and continue with the
next procedure.
No
Adjust the power supply, see
361].
To check the rectifier voltage
1
Stop the unit operation (via the central controller).
2
Turn OFF the respective circuit breaker.
Summary of Contents for VRV IV+
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