Hitachi RAS-10HRNM, Service Manual, Page: 474 / 482

12.9 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.
Comp. and fan.
motor: greater than 3M
Ω
.
Others: greater than 3M
Ω
.
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 outdoor 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 No 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 outdoor unit DB/WB. — (°C)DB (°C)WB
31
Air outlet temperature of the outdoor unit DB/
WB.
— (°C)DB (°C)WB
32 High-pressure switch. — kg/cm
2
G
33 Low-pressure switch. — kg/cm
2
G
34 Operating voltage. — V
35 Operating current. — A
36 Instructions to the client for cleaning the air filter. — Done Not yet
12 Maintenace notes
466
SMGB0060 rev. 1- 12/2010