Service And Maintenance Record - Hitachi RAS-5HVRNM1E Service Manual

12 Maintenace notes

12.9 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
14
exchanger.
Check for a leakage in the indoor heat
15
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.
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.
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.
Air outlet temperature of the outdoor unit DB/
31
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.
466
SMGB0060 rev. 1- 12/2010
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.
Comp. 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
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 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
2
kg/cm G
2
kg/cm G
V
A
Done Not yet