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The list below is provided for reference only. Inspection items and cycles need to be judged
depending on the actual condition of the product. Contact our sales department for details.
Inspection
Part name
description
Operating noise,
vibration
Smear mark
Insulation resistance
Compressor
Anti-vibration rubber
Loose terminal,
contact with wiring
Electric expansion valve
Operation check
Operation/insulation
performance
2-way and 4-way solenoid
valve
Corrosion, abnormal
Fusible plug
Appearance check
Pressure cut-off device
Operating pressure LED display on HIF board
Insulation
Crankcase heater
Operation check
Refrigerant system
Clogging
(strainer)
Refrigerant system
Corrosion of
receiver/accumulator
(vessel)
Clogging, damage
Note 8)
Air heat exchanger
Gas leaks
Water heat exchanger
Note 3), 5), 7)
Gas leaks
Operating noise,
vibration
Note 9)
Fan motor
Insulation resistance
Inverter
Appearance of
capacitor
(electrolytic capacitor)
Insulation resistance
Cooling fan
Abnormal noise
Voltage value
Pressure sensor
Resistance
Thermistor
Insulation resistance
Control box
(boards and electric parts)
Attachment of dust,
Insulation resistance
Operating noise,
vibration
Note 3), 5), 7), 10)
Pump
Loose terminal,
contact with wiring
Water leaks
Water leaks
Note 3), 7)
Water piping
Air entrainment
Strainer
Note 3), 5), 7)
Dust clogging
Note 6)
Antifreeze
Water quality
Note 4)
Chilled (warm) water
management
Inspection method
Note 1)
Visual, auditory, touch
Visual
DC500V Megger
Deformation, elasticity
Re-tighten, visual
Auditory, touch
DC500V Megger
Visual, auditory
noise
Visual
DC500V Megger
Contact with hands
Temperature difference
between before/after
inspection
Visual
Visual, wash
Gas detector
Temperature/pressure
Dirt
difference
Gas detector
Visual, auditory
DC500V Megger
Visual
DC500V Megger
Auditory
Tester
Exterior
Visual
Tester
Exterior
Visual
DC500V Megger
Visual
etc.
DC500V Megger
Visual, auditory, touch
Driver, visual
Visual
Visual
Air vent, auditory
Visual
Density
Antifreeze density
pH
Measure pH
Water quality analysis
Criteria
Inspection
cycle
<Approximate guide>
No abnormal noise or
vibration
No smear mark
No problem in insulation
resistance
Every year
No negative effect on
anti-vibration
No looseness or contact
No operation error or
Every year
deformation
No problem in insulation
resistance
Every year
No abnormal noise or
corrosion
Soluble alloy position is
Every year
normal
Operating with setpoint
Every year
No problem in insulation
resistance
Every year
No operation error
No temperature difference or
Every year
damage
No abnormal corrosion
Every year
No clogging or damage
Every year
No gas leaks
No abnormal temperature/
pressure difference
Every year
No gas leaks
No abnormal noise or
vibration
Every year
No problem in insulation
resistance
No liquid leaks or
Every year
deformation
No problem in insulation
resistance
Every year
No abnormal noise or
vibration
Specific voltage
Every year
No deformation
Specific resistance
Every year
No deformation
No problem in insulation
resistance
Every year
No accumulation of dust, etc.
No problem in insulation
resistance
No abnormal noise or
vibration
Every year
No looseness or contact
No water leaks
No water leaks
Every year
No noise of air entrainment
No dirt or dust clogging
Every year
Specified density or higher
pH7 to 10
Every year
(Antifreeze manufacturer
criteria)
Criteria in JRA-02-1994
Every year
- 72 -
Maintenance cycle
Maintenance item
Replace
Replace
Replace
20,000 hours
Replace when
deteriorated or hardened
Re-tighten
Replace when locked
20,000 hours
Replace
20,000 hours
Replace
Replace
15,000 hours
Replace
25,000 hours
Replace
8 years
Replace
20,000 hours
Repair coating
20,000 hours
Wash
5 years
Repair, replace
Wash
5 years
Repair, replace
Replace
20,000 hours
Replace
5 years
Replace
20,000 hours
Replace
5 years
Replace
5 years
Replace
20,000 hours
Clean, Replace
Replace
5 years
Correct
Replace
Re-tighten, repair
5 years
Air vent
Clean
10 years
Control density
8 years
Replace
Control water quality
8 years
Note 2)
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