Service And Maintenance Record - Hitachi RASC-4HNPE 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 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
14 Check for a leakage in the RASC heat exchanger
15 Check for a leakage in the indoor heat exchanger
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
20 Check for a leakage in the electronic expansion valve ditto
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.
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 RASC unit DB/WB
31 Air outlet temperature of the RASC 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
37 Instructions to the client about the cleaning method
38 Instructions to the client about the operation
288 SMGB0091 rev.2 - 11/2015
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: greater than
3MΩ
Others: greater than 3MΩ
Check the smooth flow by pouring some
water.
Check for any leakage.
ditto
ditto
ditto
ditto
ditto
ditto
ditto
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 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
Good Not good
Good Not good
(°C)DB (°C)WB
(°C)DB (°C)WB
(°C)DB (°C)WB
(°C)DB (°C)WB
kg/cm²G
kg/cm²G
V
A
Done Not yet
Done Not yet
Done Not yet