chapter 5000
page 60
1,2 - 2,0 t A.C.
SERVICE MANUAL
Electric
036-0410-07
CODE ALARM DESCRIPTION
37 VMN HIGH Failure in the VMN test. This test starts when the ignition key is turned on.
The alarm appears if one or more pover cables are not connected; check
the connections of the 3 power cables from the Lifting unit to the lifting
motor and the cables condition also. In order to point out if the fault is
produced by an internal or external cause connect the lifting motor.to one of
the traction logic units: Slave or Master. If the problem jumps on the traction
unit connected it means that the lifting motor is demaged, otherwise replace
the lifting unit.
38 CONTACTOR OPEN Failure on the contactor driver.
- Check main contactors coils and relevant wirings.
39 STBY I HIGH Failure on the current sensor.
- Replace the lifting unit.
40 CAPACITOR When the key is switch ON, the inverter tries to charge the capacitor
CHARGE through a power resistance, and check if the capitor are charged within a
timout. If they do not charge, an alarm is signalled;
the main contactor is not closed.
- Check the negative connection.
- Check voltage in the input of the key. Battery voltage must be present.
- Execute a short circuit between the key terminals.
- Replace the lifting unit.
41 HIGH Logic unit temperature is higher than 75°C. The maximum current is
TEMPERATURE reduced proportionally to the temperature increase. The logic unit stops at
100°C. If the alarm is signalled when the chopper is cold replace the lifting
unit.
42 MOTOR This warning is signalled if the sensor of the right motor is opened (digital
TEMPERATURE sensor). If it occurs when the motor is cold, check
- the sensor (it should be closed) and the relevant wiring loop.
- If everything is OK replace the logic unit.
Vb D1 F1 PB1
Lifting
power
capacitor
S1
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