Hitachi YUTAKI Series - Page 190

Troubleshooting
Service Manual
188
Troubleshooting procedure
SMGB0066 rev.0 - 12/2009
 



• ThealarmcodeisdisplayedonthePCB´sdisplayoftheoutdoorunit.
• Thealarmappearsafter3retriesduring30minutes.
 – Thisalarmcodeisdisplayedwhenthevoltagebetweenterminal"P"and"N"ofISPMisinsufcient.


warning
Electrical hazard. Risk of electrical shock. Be extremely carefull because of the high voltage - .
*1):Ifthecapacitorhasahighvoltage,performthehigh-voltagedischargepocedure.Refertosection"RHUE-(5/6)AHN:
Procedure for checking the ISPM".
*2):Checkingproceduresofthediodemodulearedisplayedinitem"RHUE-(5/6)AHN:ProcedureforcheckingtheISPM".
*3):DCvoltagemeasuringposition:ISPM"P"terminalto"+"terminaloftester,"N"terminalto"-"terminaloftester
measuring position: DC 1000V.
Is the Power Supply voltage
400V±10%?
No
Yes
No
Yes
Is connection correctly
between ISPM and reactor
(PCL)withcapacitors(CB1,2)
orCMC?
No
No
Yes
IstheLED201onISPMON?
Restart the operation
Is the voltage over 340V
duringoperation?
Yes
Does the voltage fall during
the operation because of the
operationofotherapparatus?
Yes
No
No
IstheDCvoltageover460V?
Check the wiring and the
cable capacity
Check the wiring ISPM and
capacitors(CB1,2)*2).
Incasethewiringiscorrect,
replace the ISPM
Faulty ISPM. Replace it.
Checkcapacitors(CB1,2).
Yes
Normal
Faulty
Replace the capacitors.
Capacitors have high voltage.
Beextremelycareful*1).
Connect correctly.
How is the
compressor
operation?
Faulty ISPM.
Replace it.
Compressor stops when
frequency increases.
(Aprox. 30 Hz to 60 Hz)
Compressor stops
immediately.
(Lower than 30 Hz)
Frequency can increase
higher than 60 Hz