Teral NX-VFC, Instruction Manual

Page: 44 / 53

8-3
8.3 Maintenance check list
Table 8-3(a) Maintenance check list
Inspection point Inspection item Method Criterion
Frequency
Consumables
Dail
y
Hal
f-ye
alyr
Yearly
Part name Qty.
Replacement
cycle
Ambient
environmen
t Temperature
Check against the
specified range.
Measure Between 0 and 40°C 䕿
Humidity Measure
85%RH or less
No condensation
䕿
Dust and other
contaminants Visual
check
No dust or other contaminants
䕿
Power
Power terminal block
Voltage Measure The specified voltage is applied. 䕿
Voltage fluctuation Measure
Within the allowable fluctuation
range
䕿
Con
trol
panel
Panel display, indicator
lamps
Check if they are lit on
Visual
check
No abnormal condition
䕿
Set values Set values
Visual
check
As per the requirements
䕿
Operations
Operations in automatic
mode Visual
check
No abnormal condition 䕿
Operating conditions
Startup pressure
Visual
check
As per the set value 䕿
Stop pressure
Visual
check
As per the specifications
䕿
Number of start time of
the unit Visual
check
400 times or less 䕿
Cumulative operation time
of each pump Visual
check
Check the adequacy. 䕿
Cumulative number of
start of each pump Visual
check
Check the adequacy. 䕿
Alarm log
Visual
check
No alarms are active.
Check the past alarms.
䕿
Ground fault interrupter Operation point
Visual
check
Not tripped 䕿
Power supply terminal
block,
Control circuit terminal
block,
Power line
Loose screws Tighten Securely tightened 䕿
Trace of heating
Visual
check
No discoloration 䕿
Adhesion of dust, damage
Visual
check
No dust or damage 䕿
Cover and its installation
status
Open/close the cover. By hand Smoothly opens/closes 䕿
Loose connections Tighten Securely tightened 䕿
Structure and
appearance
Insulator
Visual
check
No cracks or deformation 䕿
Inverter Looseness of screws Tighten Securely tightened 䕿 Inverter n
Every
5 years
Printed board Operation
Visual
check
No abnormal condition
䕿
Printed board 1
Every
5 years
Cooling fan
Noise, vibration Listen No abnormal condition
䕿
Cooling fan n
Every
3 years
Operation
Visual
check
Normal rotation
䕿
Warning
Before carrying out inspection that requires disassembly and service, be sure
to turn off the main power supply. Otherwise, it may lead to an electric shock,
and/or causes the pump to start up suddenly in automatic mode etc., thus
exposing the personnel to great danger.
Caution
Only the service personnel with special knowledge of repairs are allowed to
disassemble the unit. For work such as replacement of parts, repairs, or
inspection that requires disassembly of the unit, be sure to contact a
specialized vendor or the service center specified by Teral. Incorrect work
may cause a failure or accident.
Caution
Do not perform an insulation resistance test on the control panel. Before
performing an insulation resistance test on the motors, remove the wires from
the control panel. Otherwise, it may lead to a failure in the control panel.
Caution
Replace any packing and O-rings during inspection involving disassembly.
Otherwise, it may lead to water leakage.