replace the main breaker.
2. Disconnect the battery, discharge the DC bus and remove the control board
connector. If K1 coil terminals are in short , replace the AC-M1.
Panel overtemperature:
●
Alarm code: 20
●
Alarm level: 5
●
Alarm cause: the inverter temperature, measured with an internal probe, exceeds
100 ºC , or is between 95 ºC and 100 ºC for at least 30 s.
In case of such alarm, follow this procedure:
1. The alarm might be caused by an ineffective heating dissipation; verify the thermal
coupling between the aluminium plate and the truck ballast (or the correct
functioning of the fan if a fin-tinned heatsink is used and if the heatsink is clean).
The presence of the correct amount of thermal grease in the coupling is essential to
ensure a correct heat exchange;
2. If the measured panel temperature is slightly different from the effective panel
temperature, replace the AC-M1.
Drive motor overtemperature:
●
Alarm code: 13
●
Alarm level: 5
●
Alarm cause: The motor temperature exceeds 155 ºC..
In case of such alarm, follow this procedure:
●
Presence of this alarm with hot motors:
1. If the temperature value (as read from display or via PC) seems correct, verify if
the motor is dirty and clean motor.
●
Presence of this alarm with cold motors:
1. Measure the resistance of the drive motor temperature probe after disconnecting
the probe connector. A resistance of about 10 kOhm is expected at motor
temperature of 25°C; a voltage of about 5V must be present on the probe
connector to the control board side; check also the insulation from the motor
chassis. If the measure is not correct it is necessary to replace the temperature
probe or the motor.
2. If the resistance value is correct, but an incorrect temperature value is shown in
the display, replace the AC-M1.
Alarm on 5V voltage:
PRELIMINARY VERSION 42
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