Service And Maintenance Record - Hitachi RAS-(3-6)HVNC1(E) Service Manual

12 Maintenance notes
12.3 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 ground wire connected?
5 Refrigerant piping.
6 Fixing the units.
Is there any damage on the outer surface or the
7
internal surface?
8 Checking the screw and the bolts.
9 Tightening the terminal screws.
10 Are the compressor terminals tightly fixed?
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 exchan-
14
ger.
15 Check for a leakage in the indoor heat exchanger. Check for any leakage.
16 Check for a leakage in the 4-way valve.
17 Check for a leakage in the check valve.
18 Check for a leakage in the accumulator.
19 Check for a leakage in the strainer.
Check for a leakage in the electronic expansion
20
valve
21 Check for a leakage in the piping.
22 Check the direction of the fans.
23 Voltage among each phase.
24 Vibration and sound.
25 Activation of each operation mode.
26 High-pressure cut-out switch.
27 Check the activation of the drain-up mechanism. Check the activation during the cooling process.
28 Air inlet temperature of the indoor unit DB/WB.
29 Air outlet temperature of the indoor unit DB/WB.
30 Air inlet temperature of the outdoor unit DB/WB.
31 Air outlet temperature of the outdoor unit DB/WB.
32 High-pressure switch.
33 Low-pressure switch.
34 Operating voltage.
35 Operating current.
36 Instructions to the client for cleaning the air filter.
Instructions to the client about the cleaning
37
method.
38 Instructions to the client about the operation.
476
Tighten if loosened.
Tighten all the terminal screws with a Phillips
screwdriver.
Push all the terminals.
Measure the insulation resistance with an insu-
lation resistance meter.
Compressor and fan.
Motor: greater than 3MΩ.
Others: greater than 3MΩ.
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.
SMGB0087 rev.0 - 12/2013
Action
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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 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
(°C)DB (°C)WB
(°C)DB (°C)WB
kg/cm G
2
kg/cm G
2
V
A
Done Not yet
Done Not yet
Done Not yet