Hitachi RWM-(H)FSN3E, Руководство по обслуживанию

Страница: 379 / 424

12 Troubleshooting
SMGB0070 rev. 1 - 08/2011
369
12
Alarm code
41
Cooling Overload (High pressure switch will be activated) (RAS-2HVRN2)
• The RUN LED flickers 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.
- Abnormality indication will appear when the protection device is activated during compressor operation at cooling,
with the outdoor unit evaporation temperature higher than 55°C and the compressor-top temperature higher than
95°C.
No
Check DIP-IPM
connector wiring
Yes
RY1 turns
ON at operation
startup? Compressor
operates?
Voltage bet-
ween pins #1
and #3 of DIP-IPM
connector PCN401
approx. 0V at ope-
ration startup?
Protec-
tion device
remains activa-
ted?
No
No
Does RY1
remains ON for
more than three
seconds?
Yes
Faulty DIP-IPM
Yes
Check the temperature of the following places with the remote
control switch in checking mode.
Check the temperature of [1]
compressor top temperature and
[2] outdoor unit evaporation (piping). Examine the cause and
address the problem if the measurements surpass the preset
temperature:
1 Compressor top temperature: 95ºC or less
2 Outdoor unit evaporation (piping) temperature: 55ºC or less
Yes
No
PCN401
correctly
connected?
Yes
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 characteristics
Ambient Temperature (ºC)
Thermistor
resistance
(kΩ)
No
[Detected (Approx. 15 V)]