Hitachi RAC-50FPA, Service Manual

Page: 95 / 101

CHECKING THE REFRIGERATING CYCLE
2.96
｛
30.14
｝
2.62
｛
26.72
｝
2.31
｛
23.58
｝
2.03
｛
20.73
｝
1.78
｛
18.14
｝
1.55
｛
15.79
｝
1.34
｛
13.66
｝
1.15
｛
11.74
｝
0.98
｛
10.02
｝
0.83
｛
8.48
｝
0.70
｛
7.10
｝
0.58
｛
5.89
｝
0.47
｛
4.81
｝
Outdoor air
temperature
(℃)
50
45
40
35
30
25
20
15
10
5
0
-5
-10
（R410A)
The values above are the theoretical ones.
Lo Hi
Connect U,V,W phase leads to the
power module again and operate the
air conditioner.
Is the self-diagnosis lamp mode as
shown on the right?
Stop to operate and check the gas
pressure in balancing mode.
●
Checking the power module.
The compressor is defective. Replace it
and seal refrigerant.
If the compressor checker for an
inverter type air conditioner is
available, re-check using it.
Gas leaks.
Repair and seal refrigerant.
Perform a final check of operation.
YES
Gas leaking
Lighting mode
Blinks
2 times
Blinks
3 times
Blinks
4 times
Blinks
5 times
Blinks
6 times
Blinks
8 times
LD301
Approx. 10 seconds
Compressor
Blinking Off
Time until the
lamp lights
Possible
malfunctioning
part
Approx.
10
seconds Approx.
10
seconds
Within
approx.
30
minutes
Gas
leakage
Compressor
Self ･
diagnosis Lamp
Outdoor
unit
Manifold
valve
When the
self-diagnosis lamp
lights in the same
condition as above.
Normal
(JUDGING BETWEEN GAS LEAKAGE AND COMPRESSOR DEFECTIVE)
Mpa(G)｛ kgf/cm
2
(G) ｝
Charge port pressure
95