Hitachi FSXN Series, Service Manual

Page: 361 / 367

12.9 Service and maintenance table
No. Check item Action Judgement
1 Is the service space sufficient? Yes No
2 Is there a short circuit in the discharge air? Yes No
3 Any heat influence? Yes No
4 Is the earth wire connected? Yes No
5 Refrigerant pipe Correct Incorrect
6 Fixing of units Correct Incorrect
7
Are the internal and external surfaces
damaged?
Yes No
8 Are the screws and bolts tightened? Tighten if loose. Tightened
Not
tightened
9 Are the terminal screws tightened?
Tighten the screws on the terminals with a
Philips screwdriver.
Tightened
Not
tightened
10 Are the compressor terminals tightened? Push all the terminals. Push
Not
push
11 Insulation resistance
Measure the insulation resistance with a
multimeter.
Fan and compressor:
Motor: greater than 3 M
Ω
.
Others: greater than 3 M
Ω
.
Correct Incorrect
12
Are there drainage problems in the water
flow?
Check the smoth flow with a little water. Correct Incorrect
13 Is there leakage in the compressor? Check there is no leakage. Correct Incorrect
14
Is there leakage in the outdoor heat
exchanger?
Check there is no leakage. Correct Incorrect
15
Is there leakage in the indoor heat
exchanger?
Check there is no leakage. Correct Incorrect
16 Is there leakage in the 4-way valves? Check there is no leakage. Correct Incorrect
17 Is there leakage in the check valve? Check there is no leakage. Correct Incorrect
18 Is there leakage in the accumulator? Check there is no leakage. Correct Incorrect
19 Is there leakage in the strainer? Check there is no leakage. Correct Incorrect
20 Is there leakage in the expansion valve? Check there is no leakage. Correct Incorrect
21 Is there leakage in the piping? Check there is no leakage. Correct Incorrect
22 Check the direction of the fans See the air flow volume. Correct Incorrect
23 Check the voltage of each phase Greater than 220 V. Correct Incorrect
24 Vibrations and noise
Check the compressor, the piping, the fan,
etc.
Correct Incorrect
25 Activation of the operation modes
Activate the COOL switch, the HEAT switch,
the STOP switch and the TEMP switch.
Correct Incorrect
26 Cut-out of the high pressure switch Check the current activation valve. Correct Incorrect
27 Activate the drain-up mechanism Check it is activated during cooling mode. Correct Incorrect
28 Indoor inlet air temperature DB/WB — (°C) DB (°C) WB
29 Indoor outlet air temperature DB/WB — (°C) DB (°C) WB
30 Outdoor inlet air temperature DB/WB — (°C) DB (°C) WB
31 Outdoor outlet air temperature DB/WB — (°C) DB (°C) WB
32 High pressure switch — MPaG
33 Low pressure switch — MPaG
12 Maintenance notes
359
SMGB0065 rev. 1 - 12/2010
12