EM8 User's Manual
6.Care and Maintenance
76
6. Care and Maintenance
6.1 Daily inspections and maintenance
High temperature, humidity, dust, vibration and aging parts may affect the steady running of the EM8
series inverter. To avoid this, it is recommend to perform a periodic inspection every 3-6 months.
Warning
●
Only skilled professionals allowed to perform the inspection. When necessary, make sure to remove the
input power before performing inspection.
Period
Inspection
Item
Inspection Content
Criterion
Daily
periodic
√
Ambient
environment
1.Temperature,
humidity
2.Dust,gas
1. Temperature>40
o
C: open the cover
board Humidity<90%: no freezing.
2. No peculiar smell, no inflammable,
explosive gas.
√
Cooling
System
1.Installation
environment
2.Fan built in
frequency inverter
1. Well ventilated installation
environment, no block in the air flue.
2. Running smoothly, no abnormal
noise.
√
Frequency
inverter body
1.Vibration,
temperature
2.Noise
3.Wire,terminal
1. Steady vibration, normal temperature
of air outlet.
2. No unusual noise and odors.
3. Tighten the screws without loose.
√
motor
1.Vibration,
temperature
2.Noise
1. Running smoothly, normal
temperature.
2. Usual and steady noise.
√
Input and
output
Parameter
1.Input voltage
2.Output current
1. Input voltage within the specified
range.
2. Output current in the specified range.
Inspection and Maintenance Items
Recommended meter:
input voltage: Moving-coil voltmeter input and output current: Clamp-on ammeter
output voltage: Commutator voltmeter.
Warning
●
Before leaving the factory, inverters have been tested by electrical insulation experiment. Inverters do not
need to be high voltage tested.
●
If the insulation test is necessary, circuit all the input and output terminals(R, S, T, U, V, W, P, P-, PB).
Single terminal insulation is strictly forbidden. Use 500V mega meter to test.
●
Do not use the mega meter to test the control loop.
●
Before an insulation for the motor, dismantle the wires contacting motor with inverter.
6.2 Periodic maintenance
Periodic inspection is needed every 3 months or 6 months, base on the usage of user.
