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15 CONTACTOR CLOSED
This check is made during the initial diagnosis. With the coil of the line contactor de-
energized, the capacitors should not be charged, unless there is divert resistor
across the power poles. Possible causes:
a) The line contactor power poles are welded.
b) This alarm could be generated even if the line contactor has opened, but there is
a problem with either the field circuit, or a problem detected by the safety micro-
processor.
16 TH. PROTECTION
If the temperature of the chopper rises higher than 70°C, this alarm is generated.
The chopper current is reduced in proportion to the increase in temperature. At
80°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.
17 BATTERY LOW
This Alarm is generated when the battery becomes 50% discharged from the nomi-
nal value.
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