Hitachi RAS-(3-6)HVRNM2E - Cooling Overload (High Pressure Switch will be Activated) for IVX Series

8 Troubleshooting
252
SMGB0064 rev.0 - 08/2011
Alarm code
41
Cooling Overload (High pressure switch will be activated) 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 code is indicated when the protection device is activated at following condition. Evaporation temperature
of outdoor unit is more than 55 degree and top of compressor temperature is more than 95 degree.
Is CMC
ON?
Faulty PCB1.
No
Yes
Is the voltage
between PCN9#1 and
#3 220V/240V?
No
Is protection device
activated?
No
Is CMC
ON?
Yes
No
Faulty PCB1.
YesYes
Check the following value by remote
control switch.
1. Top of compressor temperature: 95ºC
or less
2. Liquid refrigerant piping temperature of
indoor unit: 55ºC or less If exceeding the
above value, repair it.
90
80
70
60
50
40
30
20
10
0
-15 -10 -5 0 5 10 15 20 25 30 35 40 45 50 55 60
Thermistor resistance (kΩ)
Ambient temperature (ºC)
Thermistor characteristics