Hitachi RASC-10HNPE, Service Manual, Page: 298 / 306

11 Maintenance notes
Service and maintenance record
SMGB0091 rev.2 - 11/2015 288
11.3 Service and maintenance record
No. Check item Action Judgement
1 Is the service area sufficient? - Yes No
2 Is there a short circuit of the discharged air? - Yes No
3 Any heat influence? - Yes No
4 Is the ground wire connected? - Yes No
5 Refrigerant piping - Good Not good
6 Fixing the units - Good Not good
7
Is there any damage on the outer surface or the
internal surface?
- Yes No
8 Checking the screw and the bolts Tighten if loosened. Tightened Not tightened
9 Tightening the terminal screws
Tighten all the terminal screws with a
Phillips screwdriver.
Tightened Not tightened
10 Are the compressor terminals tightly fixed? Push all the terminals. Pushed Not pushed
11 Insulation resistance
Measure the insulation resistance with an
insulation resistance meter.
Compressor and fan motor: greater than
3MΩ
Others: greater than 3MΩ
Good Not good
12 Does the drain water flow smoothly?
Check the smooth flow by pouring some
water.
Good Not good
13 Check for a leakage in the compressor Check for any leakage. Good Not good
14 Check for a leakage in the RASC heat exchanger ditto Good Not good
15 Check for a leakage in the indoor heat exchanger ditto Good Not good
16 Check for a leakage in the 4-way valve ditto Good Not good
17 Check for a leakage in the check valve ditto Good Not good
18 Check for a leakage in the accumulator ditto Good Not good
19 Check for a leakage in the strainer ditto Good Not good
20 Check for a leakage in the electronic expansion valve ditto Good Not good
21 Check for a leakage in the piping ditto Good Not good
22 Check the direction of the fans By viewing the airflow volume Good Not good
23 Voltage among each phase Higher than AC220V Good Not good
24 Vibration and sound
Check the fan, the compressor, the
piping, and others.
Good Not good
25 Activation of each operation mode
Check the activation of the COOL switch,
the HEAT switch, the STOP switch and
the TEMP switch.
Good Not good
26 High-pressure cut-out switch Check the actual activation value. Good Not good
27 Check the activation of the drain-up mechanism.
Check the activation during the cooling
process.
Good Not good
28 Air inlet temperature of the indoor unit DB/WB - (°C)DB (°C)WB
29 Air outlet temperature of the indoor unit DB/WB - (°C)DB (°C)WB
30 Air inlet temperature of the RASC unit DB/WB - (°C)DB (°C)WB
31 Air outlet temperature of the RASC unit DB/WB - (°C)DB (°C)WB
32 High-pressure switch - kg/cm²G
33 Low-pressure switch - kg/cm²G
34 Operating voltage - V
35 Operating current - A
36 Instructions to the client for cleaning the air filter - Done Not yet
37 Instructions to the client about the cleaning method - Done Not yet
38 Instructions to the client about the operation - Done Not yet