Mitsubishi Electric PURY-EP200 Service Handbook page 292

[ IX Troubleshooting ]
[6] (1)
Check the FAN
board failure.
(2)
(3)
(3) Trouble treatment when the main power breaker is tripped
Items to be checked
[1] Check the breaker capacity.
[2] Perform Meg check between the
terminals on the power terminal
block TB1.
[3] Turn on the power again and
check again.
[4] Turn on the outdoor unit and check
that it operates normally.
HWE0713A
Check the fan output wir-
ing.
Check the connector CN-
VDC connection.
Check the FAN board fail-
ure.
Use of a non-specified break-
er
Zero to several ohm, or Meg
failure
1) Main power breaker trip
2) No remote control display
1) Operates normally without
tripping the main breaker.
2) Main power breaker trip
Connector contact failure
Board side (CNINV)
Fan motor side
Cnnector contact failure
1) The voltage imbalance among each
motor wiring during operation
(The voltage imbalance is greater
than the larger of the values repre-
sented by 5% or 5 V.)
2) The same error occurs even after
the operation is restarted.
Phenomena
- 283 -
Connect the connector.
Connect the connector.
Replace the FAN board.
Remedy
Replace it with a specified breaker.
Check each part and wiring.
*Refer to (5) "Simple checking Procedures
for individual components of main inverter
circuit".(page 289)
IGBT module
Rush current protection resistor
Electromagnetic relay
DC reactor
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].
GB