Hitachi UTOPIA RAS-4HVRP2E - Service and Maintenance Record

11 Maintenance notes
Service and maintenance record
SMGB0136 rev.0 - 07/2021
327
11
11.3 Service and maintenance record
No. Check item Action Judgement
1 Is the service area sufcient? — Yes No
2 Is there a short circuit of the discharged air? — Ye s No
3 Any heat inuence? — Yes No
4 Is the earth wire connected? — Yes No
5 Refrigerant piping. — Good Not Good
6 Fixing the units. — Good Not Good
7
Are the internal and external surfaces
damaged?
— Yes No
8 Are the screws and bolts tightened? Tighten if loosened. Tightened Not Tightened
9 Are the terminal screws tightened?
Tighten all the terminal screws with a Phillips
screwdriver.
Tightened Not Tightened
10 Are the compressor terminals tightened? Push all the terminals. Pushed Not Pushed
11 Insulation resistance.
Measure the insulation resistance with an
insulation resistance meter.
Compressor and fan.
Motor: > 3MΩ (3HP) / 100MΩ (4-6HP).
Others: > 3MΩ (3HP) / 1MΩ (4-6HP).
Good Not Good
12 Does the drain water ow smoothly? Check the smooth ow 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.
Check for any leakage. Good Not Good
15 Check for a leakage in the 4-way valve. Check for any leakage. Good Not Good
16 Check for a leakage in the check valve. Check for any leakage. Good No Good
17 Check for a leakage in the accumulator. Check for any leakage. Good Not Good
18 Check for a leakage in the strainer. Check for any leakage. Good Not Good
19
Check for a leakage in the electronic
expansion valve.
Check for any leakage. Good Not Good
20 Check for a leakage in the piping. Check for any leakage. Good Not Good
21 Check the direction of the fans. By viewing the airow volume. Good Not Good
22 Voltage among each phase. Higher than AC220V. Good Not Good
23 Vibration and noise.
Check the fan the compressor the piping and
others.
Good Not Good
24 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
25 High-pressure cut-out switch. Check the actual activation value. Good Not Good
26
Check the activation of the drain-up
mechanism.
Check the activation during the cooling process. Good Not Good
27
Air inlet temperature of the outdoor unit DB/
WB.
— (°C)DB (°C)WB
28
Air outlet temperature of the outdoor unit DB/
WB.
— (°C)DB (°C)WB
29 High-pressure switch. — psi (G)
30 Low-pressure switch. — psi (G)
31 Operating voltage. — V
32 Operating current. — A
33
Instructions to the customer for cleaning the
air lter.
— Done Not yet
34
Instructions to the customer about the
cleaning method.
— Done Not yet
35
Instructions to the customer about the
operation.
— Done Not yet