5-5
5.4 Maintenance
checklist
Inspection interval
Consumables
Item
Inspection point
Inspection item
Inspection
method
Criterion
(Reference page)
Daily Monthly
Half-
yearly
Yearly
Timing of replacement
(as a guide)*
1
Temperature
Measure
Between 0 and 40°C (2-2)
-
Humidity Measure
Less than 85% RH (2-2)
(
no condensing)
-
Ambient
condi
tion
s
Dust and other
contaminants
Check against the
specified range.
Visual check
No dust or other
contaminants
-
Voltage
Measure
Specified voltage (2-2)
-
Voltage fluctuation
Measure
Within the allowable
fluctuation range (2-2)
-
Power
Power terminal block
Loose screws
Retighten
Securely tightened
-
Performance
Visual check
As per the specifications
Current value
Measure
As per the specifications
Operation condition
Noise, vibration
Listen, Touch No abnormal vibration
When abnormality is
recognized,
disassemble and
inspect the pump.
Clogging
Disassemble and
inspect
No clogging
Impeller
Wear
Disassemble and
inspect
No abnormal condition
When worn out and
performance is
deteriorated
Liner ring
Wear
Disassemble and
inspect
No abnormal condition
When worn out and
performance is
deteriorated
Main shaft and its
surrounding area
Smooth rotation
Rotate by hand
Rotation is smooth and
uniform
-
Heat-generation,
noise, vibration-
Touch, Listen,
Visual check
No abnormal condition(5-1)
Every three years (or
after 15000-hours
operation)
Bearing*
2
Grease supply
(pump)
Visual check,
Listen
No abnormal vibration or
noise. No leakage
Refer to 5.3 for grease
supply
Gland packing
Leakage
Retighten
Proper drip rate (5-2)
Every 6 months (or
after 2000-hours
operation)
Mechanical seal
Leakage
Visual check
No leakage (5-3
Once a year (or after
8000-hours
operation)
Coupling rubber
Deterioration, wear
Visual check
Abnormal abrasion
No deterioration
Once a year (or after
8000-hours
operation)
O-ring
-
- -
Whenever
disassembled
Appearance
Unusual noise,
vibration
Visual check,
Listen
No abnormal condition
-
Winding resistance
Resistance value
between each winding
(U-V, V-W, W-U)
Measure
Resistance value is uniform
between the windings
-
Pum
p
and
m
o
to
r
Insulation resistance
Between the ground
and each lead wire
Measure
1 M
Ω
or more (by DC500V
Megger tester)
-
*1
The timing of replacing consumables (as a guide) does not mean their guaranteed service life. The service life of parts varies
depending on the ambient conditions and the conditions for use.
*2
For MTP/MTP-e: Long-life urea grease or lithium grease is used as lubricating grease in bearings. Use the bearings into which the
same type of grease is filled. When you replace a bearing, it is recommended to select a bearing equivalent to the following.
Model
Type of Grease
Bearing (Grease brand)
MTP(0.4kW)
Lithium-base
(MULTEMP SRL grease)
MTP(0.75, 1.5kW)
MTP-e (0.75kW)
Urea-base
Bearings by NSK (EA2 grease)
Bearings by NACHI (FNS3D grease)
MTP-e (1.5kW and over)
Urea-base
Bearings by NSK (ENS grease)
MTP (2.2kW and over)
Urea-base
-
Note
The timing of replacement for the consumables is the reference values when normally
used and checked regularly. It may become short according to the use condition.
Note
Dispose of the waste components generated by the repair or the replacement
according to the local regulations, by asking the specialized waste disposal contractor.
