5-3
Maintenance check list
Inspection interval Consumables
Item
Inspection point Check item
Check
method
Criterion
(Reference page)
Daily Monthly
Half-
yearly
Yearly
Timing of
replacement *
1
Temperature Measure -20 to 40°C or less (2-2)
-
Humidity Measure 85% RH or less (2-2)
-
Ambient
environment
Dust, etc.
As per the range in
the specifications
Visual
check
Free of dust or other
contaminants
-
Voltage Measure Specified voltage (2-2)
-
Voltage fluctuation Measure
Within the allowable range of
voltage fluctuation (3-5)
-
Power
Power terminal block
Loose screws Retighten No loose screws
-
Clogging
Inspect after
disassembly
No clogging
-
Impeller
Wear
Inspect after
disassembly
No fault shall be found.
When worn out
Rotate by hand Smooth rotation
Rotate by
hand
Not unusually stiff, Not even in
weight (4-1)
-
Bearing (Motor) *
2
Heating Touch Not unusually hot (5-1)
1 to 2 years
O-rings - - -
Whenever
disassembled
Rubber
parts
Oil seals,
etc.
- - No fault shall be found.
1 to 2 years
Others (screws etc.) - - No fault shall be found.
As needed
Appearance
Unusual noise,
vibration
Hear
Visual
check
No fault shall be found.
-
Pump and motor
Insulation resistance
Between the ground
and each lead
Megger
tester
1 MΩ or more
-
*1 The timing of replacement is not a guaranteed value. The useful life of parts varies depending on
ambient environment and use conditions.
*2 Since urea-based grease is applied for the purpose of a lifetime extension, use urea-based grease
filled bearings.
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