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16 CONTACTOR CLOSED
This check is made during the initial diagnosis. With the coil of the Main Contactor
de-energised, the capacitors should not be charged, unless there is divert resistor
across the power poles. Possible causes:
a) The contactor power poles are welded
.
b) This alarm could be generated if the Main Contactor has opened, but there is a
problem with either the field circuit, or a problem detected by the safety micro-
processor.
17 MOTOR TEMPERAT
The temperature of the motor has become higher than the threshold set by the
motor sensor. When this Alarm is generated, the motor speed is reduced. If this
alarm appears with a cold motor:
a) Check the connection to the temperature sensor.
b) Check that there is no problem with the temperature sensor.
c) Check there is no problem with the motor temperature.
18 TH PROTECTION
If the temperature of the chopper rises higher than 77°C, this alarm is generated.
The chopper current is reduced in proportion to the increase in temperature.
At 92°C the chopper totally stops. If the temperature of the chopper is < -10°C, this
Alarm is also generated and the current is reduced by 80 %. If this alarm is dis-
played when the chopper is temperature is the same as ambient or better than zero
degrees:
a) Check the connection of the temperature sensor.
b) The temperature sensor may be defective.
c) The logic may be defective.
19 BATTERY LOW
This Alarm is generated when the battery becomes 50% discharged from the
