[
IX
Troubleshooting ]
- 224 -
HWE1113B
GB
(3) Trouble treatment when the main power breaker is tripped
(4) Trouble treatment when the main power earth leakage breaker is tripped
The insulation resistance could go down to close to 1Mohm after installation or when the power is kept off for an extended
period of time because of the accumulation of refrigerant in the compressor. If the earth leakage breaker is triggered, please
use the following procedure to take care of this.
Disconnect the wires from the compressor's terminal block.
If the resistance is less than 1 Mohm, switch on the power for the outdoor unit with the wires still disconnected.
Leave the power on for at least 12 hours.
Check that the resistance has recovered to 1 Mohm or greater.
Earth leakage current measurement method
For easy on-site measurement of the earth leakage current, enable the filter with a measurement instrument that has filter
functions as below, clamp all the power supply wires, and measure.
Recommended measurement instrument: CLAMP ON LEAK HiTESTER 3283 made by HIOKI E.E. CORPORATION
When measuring one device alone, measure near the device's power supply terminal block.
Items to be checked
Phenomena
Remedy
[1]
Check the breaker capacity.
Use of a non-specified break-
er
Replace it with a specified breaker.
[2]
Perform Meg check between the
terminals on the power terminal
block TB1.
Zero to several ohm, or Meg
failure
Check each part and wiring.
*Refer to (5) "Simple checking procedures
for individual components of main inverter
circuit".(page 225)
IGBT module
Rush current protection resistor
Electromagnetic relay
DC reactor
[3]
Turn on the power again and
check again.
1)
Main power breaker trip
2)
No remote control display
[4]
Turn on the outdoor unit and check
that it operates normally.
1)
Operates normally without
tripping the main breaker.
a) The wiring may have been short-circuit-
ed. Search for the wire that short-circuit-
ed, and repair it.
b) If item a) above is not the cause of the
problem, refer to (2)-[1]-[6].
2)
Main power breaker trip
Items to be checked
Phenomena
Remedy
[1]
Check the earth leakage breaker
capacity and the sensitivity cur-
rent.
Use of a non-specified earth
leakage breaker
Replace with a regulation earth leakage
breaker.
[2]
Check the resistance at the power
supply terminal block with a meg-
ger.
Failure resistance value
Check each part and wiring.
*Refer to (5) "Simple checking procedures
for individual components of main inverter
circuit".(page 225)
IGBT module
Rush current protection resistor
Electromagnetic relay
DC reactor
[3]
Disconnect the compressor wir-
ings and check the resistance of
the compressor with a megger.
Failure compressor if the insu-
lating resistance value is not in
specified range.
Failure when the insulating re-
sistance value is 1 Mohm or
less.
Check that there is no liquid refrigerant in
the compressor. If there is none, replace
the compressor.
[4]
Disconnect the fan motor wirings
and check the resistance of the fan
motor with a megger.
Failure fan motor if the insulat-
ing resistance value is not in
specified range.
Failure when the insulating re-
sistance value is 1 Mohm or
less.
Replace the fan motor.
Summary of Contents for City Multi CMB-WP108V-G
Page 1: ...AIR CONDITIONER 2014 Service Handbook PURY WP200 WP250YJM A CMB WP108V G Model 3rd edition ...
Page 11: ... 2 HWE1113B GB ...
Page 27: ... I Read Before Servicing 18 HWE1113B GB ...
Page 29: ... 20 HWE1113B GB ...
Page 57: ... 48 HWE1113B GB ...
Page 70: ... III Outdoor Unit Components 61 HWE1113B GB 2 Power supply circuit board ...
Page 71: ... III Outdoor Unit Components 62 HWE1113B GB ...
Page 73: ... 64 HWE1113B GB ...
Page 81: ... IV Remote Controller 72 HWE1113B GB ...
Page 83: ... 74 HWE1113B GB ...
Page 89: ... 80 HWE1113B GB ...
Page 97: ... 88 HWE1113B GB ...
Page 127: ... 118 HWE1113B GB ...
Page 135: ... VIII Test Run Mode 126 HWE1113B GB ...
Page 137: ... 128 HWE1113B GB ...
Page 253: ... 244 HWE1113B GB ...