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15 CONTACTOR CLOSED
AL 37 MDI
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
microprocessor.
16 TH. PROTECTION
AL 62 MDI
If the temperature of the chopper rises higher than 75°C, this alarm is generated.
The chopper current is reduced in proportion to the increase in temperature. At
90°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
displayed when the chopper temperature is the same as ambient or =<10°C:
a) Check the connection of the temperature sensor.
b) The temperature sensor may be defective.
c) The logic may be defective.
17 POWER FAILURE #1
AL 73 MDI
Short circuit on the brake or on the main contactor coil.
Possible cause
a) failure of the logic board;
b) wiring error;
c) short circuit on contactor coil.
18 EB DRIVER KO
AL 2 MDI
The EB driver doesn't close.
19 EB DRIVER SHORT
AL 91 MDI
The EB driver is shorted. Check the negative of the brake: it may be in short circuit
with -B.
20 BATTERY LOW
AL 66 MDI
This Alarm is generated when the battery becomes 50% discharged from the
nominal value.
