Hitachi RAS-2-HVNP - Page 257

8. Troubleshooting
243
SMGB0079 rev.0 - 01/2013
8
Are the power wires
passed through
CT(inverter element)?
Pass the power
wires through CT
Check transistor
module (*1) (*2)
Check inverter
PCB
Replace transistor
and inverter
Replace transistor
module
Apply silicon to cover
entirely the space
Is the space between
the transistor module
and radiation fins entirely
covered by silicon?
N O T E
• *1)PerformthehighvoltagedischargeworkbyreferringtotheitemProcedureofcheckingothermainparts, 
beforecheckingandreplacingtheinvertercomponents.
• *2) Regarding replacing orchecking method forinverter components, refer toitem Procedure of checking
othermainparts.
• *3)TurnONtheNo.1switchofthedipswitchDSW1onPCB2(inverter)whenrestartingwithdisconnectingthe
terminalsofthecompressor.Aftertroubleshooting,turnOFFtheNo.1switchofthedipswitchDSW1onPCB2.
• Whenthealarmcode“53”isindicated,theoutdoorfanmotor(DCmotor)ensurethatDCfanmotorischecked
accordingtotheitemProcedureofcheckingothermainparts.