Service And Maintenance Record - Hitachi UTOPIA RAS-4HVRP2E Service Manual

11 Maintenance notes
Service and maintenance record

11.3 Service and maintenance record

No. Check item
1 Is the service area sufficient?
2 Is there a short circuit of the discharged air?
3 Any heat influence?
4 Is the earth wire connected?
5 Refrigerant piping.
6 Fixing the units.
Are the internal and external surfaces
7
damaged?
8 Are the screws and bolts tightened?
9 Are the terminal screws tightened?
10 Are the compressor terminals tightened?
11 Insulation resistance.
12 Does the drain water flow smoothly?
13 Check for a leakage in the compressor.
Check for a leakage in the outdoor heat
14
exchanger.
15 Check for a leakage in the 4-way valve.
16 Check for a leakage in the check valve.
17 Check for a leakage in the accumulator.
18 Check for a leakage in the strainer.
Check for a leakage in the electronic
19
expansion valve.
20 Check for a leakage in the piping.
21 Check the direction of the fans.
22 Voltage among each phase.
23 Vibration and noise.
24 Activation of each operation mode.
25 High-pressure cut-out switch.
Check the activation of the drain-up
26
mechanism.
Air inlet temperature of the outdoor unit DB/
27
WB.
Air outlet temperature of the outdoor unit DB/
28
WB.
29 High-pressure switch.
30 Low-pressure switch.
31 Operating voltage.
32 Operating current.
Instructions to the customer for cleaning the
33
air filter.
Instructions to the customer about the
34
cleaning method.
Instructions to the customer about the
35
operation.
327 SMGB0136 rev.0 - 07/2021
Action
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Tighten if loosened.
Tighten all the terminal screws with a Phillips
screwdriver.
Push all the terminals.
Measure the insulation resistance with an
insulation resistance meter.
Compressor and fan.
Motor: > 3MΩ (3HP) / 100MΩ (4-6HP).
Others: > 3MΩ (3HP) / 1MΩ (4-6HP).
Check the smooth flow by pouring some water.
Check for any leakage.
Check for any leakage.
Check for any leakage.
Check for any leakage.
Check for any leakage.
Check for any leakage.
Check for any leakage.
Check for any leakage.
By viewing the airflow volume.
Higher than AC220V.
Check the fan the compressor the piping and
others.
Check the activation of the COOL switch the
HEAT switch the STOP switch and the TEMP
switch.
Check the actual activation value.
Check the activation during the cooling process.
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Judgement
Yes No
Yes No
Yes No
Yes No
Good Not Good
Good Not Good
Yes No
Tightened Not Tightened
Tightened Not Tightened
Pushed Not Pushed
Good Not Good
Good Not Good
Good Not Good
Good Not Good
Good Not Good
Good No Good
Good Not Good
Good Not Good
Good Not Good
Good Not Good
Good Not Good
Good Not Good
Good Not Good
Good Not Good
Good Not Good
Good Not Good
(°C)DB (°C)WB
(°C)DB (°C)WB
psi (G)
psi (G)
V
A
Done Not yet
Done Not yet
Done Not yet
11