Hitachi Utopia RPI-2.5HRG Service Manual page 43

TROUBLESHOOTING
Alarm
Code
This alarm code is indicated when the protection device is activated at following condition.
Evaporating temperature of outdoor unit is more than 55 degree and top of compressor temperature is
more than 95 degree.
Is CMC ON?
Yes
Is CMC ON more
than 3 seconds?
Yes
Check the following value by remote control switch.
1. Top of Compressor Temperature:
2. Evaporating Temperature of Outdoor Unit: 55
If exceeding the above value, repair it.
1-40
(High Pressure Switch will be Activate)
No
Is the voltage between
PCN9#1 and #3
220V/240V?
Yes
No
Cooling Overload
No
Is protection
device activated?
o
95 C or less
o
C or less
No
Faulty PCB1.
Yes
Faulty PCB1.