Hitachi RAS-(4-6)HVRNS2E - Activation of the Safety Device in the Outdoor Unit for IVX Series

8 Troubleshooting
208
SMGB0064 rev.0 - 08/2011
Alarm code
02
Activation of the safety device in the outdoor unit for IVX series
• The RUN LED ickers and “ALARM” is displayed on the remote control switch.
• The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit
number and the alarm code are displayed on the display of the outdoor unit PCB.
- This alarm is indicated when one of safety devices is activated during compressor running.
Does CMC1 ON
when starting?
Faulty PCB1.
No
Yes
Is the voltage 240V
or 220V existing at
the #1 to #3 of PCN9
during Y52C is ON?
No
Is the protective
device still operating?
No
Does CMC1 turn
ON for more than
3 seconds?
Yes
No
Faulty PCB1.
Yes
Yes
Normal PCB1
Is the CMC1 coil
broken?
Is the protective
device still operating?
Yes
Faulty CMC1
No
Yes
No
Yes
Remove the cause after checking.
(1) High pressure switch
(PSH: 4.15MPa (41.5 kgf/cm²G))
(2) Is the power source line reverse phase or open phase?
If the wiring is incorrect, perform the wiring correctly again.
Check item
Connector No. Pin No.
PCN9 #1 to #3
Check activation of the following safety devices and the power
source wiring.