Chapter 7 Maintenance 89
EV2000 Series Universal Variable Speed Drive User Manual
forbidden; otherwise the drive might be damaged.
Please use a 500V Mega-Ohm-Meter.
EV2000
U
V
W
PE
VRF
VCI
GND
FWD
COM
R
S
T
TA
TB
TC
X
7
P24
X
8
X
6
.
.
.
.
.
.
.
.
.
.
.
.
P1 (+) (-)
.
Fig. 7-1 Insulation test of drive
8. Before the insulation test of the motor, disconnect the
motor from the drive to avoid damaging it.
EV2000
U
V
W
PE
VRF
VCI
GND
FWD
COM
R
S
T
TA
TB
TC
X7
P24
X8
X6
.
.
.
.
.
.
.
.
.
.
.
.
P1
(+) (-)
M
Fig. 7-2 Insulation test of motor
Notes:
Dielectric strength test of the drive has already been
conducted in the factory. Do not do the test again,
otherwise, the internal components might be damaged.
7.3 Replacing Wearing Parts
The components that are easily damaged are: cooling
fan and electrolytic capacitors of filters. Their lifetime
depends largely on their application environment and
preservation. Normally, lifetime is:
Components Life
Fan 3~40,000 hours
Electrolyte capacitor 4~50,000 hours
You can decide the time when the components should
be replaced according to their service time.
Cooling fan
Possible cause of damages: wear of the bearing, aging
of the fan vanes.
Criteria:
After the drive is switched off, check if abnormal
conditions such as crack exists on fan vanes and other
parts. When the drive is switched on, check if drive
running is normal, and check if there is any abnormal
vibration.
2. Electrolytic capacitors
Possible cause of damages: high ambient temperature,
aging of electrolyte and large pulse current induced by
rapid changing loads.
Criteria: Check if frequent over-current or over-voltage
failures occur during drive start-up with load. Check if
there is any leakage of liquids. Check if the safety valve
protrudes. Measure static capacitance and insulation
resistance.
7.4 Storage
The following points must be followed for the temporary
and long-term storage of drive:
1. Store in locations free of high temperature, humidity,
dust, metal powder, and with good ventilation.
2. Long-term storage will cause the deterioration of
electrolytic capacitors. Therefore, the drive must be
switched on for a test within 2 years at least for 5 hours.
The input voltage must be boosted gradually by the
voltage regulator to the rated value.
7.5 Warranty
Emerson Network Power will offer warranty service in
the case of the following situations:
1.The warranty clause is only confined to the drive;
2. Emerson Network Power will take the responsibility of
18 months defects liability period for any faults or
damages under the normal operation conditions. After
18 months, maintenance will be charged;
3. Even within 18 months, maintenance would be
charged under the following conditions:
4.Damages incurred to the drive due to incorrect
operation, which are not in compliance with “User
Manual”;
② Damages incurred to the drive due to fire, flood,
abnormal voltage and so on;
③ Damages incurred to the drive due to the improper
use of drive functions;
5. Service fee will be charged according to the actual
costs. If there are any maintenance contracts, the
contract prevail.
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