Hitachi RAS-(3-6)HVRNM2E - Checking the Power Source and the Wiring Connection

12 Maintenace notes
462
SMGB0064 rev.0 - 08/2011
12.1 Checking the power source and the wiring connection
Check the following items in the case of abnormal operation:
No. Check item Procedure
1
Is the breaker of the fuse cut
out?
Check the secondary voltage of the breaker and the fuse by means of a tester.
2
Is the secondary power source
on the transformer correct?
Disconnect the secondary side of the transformer and check the voltage by means of a tester.
Indoor unit
transformer
Secondary
side
Primary side
220, 230 or
240 V
Circuit and voltage
12 V
12 V
3
Is the wiring loosened or inco-
rrectly connected?
Check the wiring connection on the PCB.
• Thermistor connectors
• Connector of the remote control cable
• Connector of the transformer
Each connector in a high-voltage circuitCheck the connectors according to the electrical wiring
diagram.