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