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© Mitsubishi Forklift Trucks 2013. All
© Mitsubishi Forklift Trucks 2013. All
CODE
CODE
29
29
30
30
rights reserved.
rights
reserved.
Revision: B
Revision: B
PBV20N2
PBV20N2
TRUCKTOOL
TRUCKTOOL
AND
AND
DISPLAY
DISPLAY
Pump motor output voltage error (high)
Pump motor output voltage error (high)
PUMP VMN HIGH
PUMP VMN HIGH
This test is carried out when the pump motor is turning. The
This test is carried out when
motor output is higher than expected.
motor output is higher than
expected.
In such a case, check the following:
In such a case, check the following:
Motor connections
Motor connections
•
•
If the motor windings or cables have leakages towards the truck frame
If the motor windings or cables have leakages to
•
•
If no problems are found
If no problems are found on the motor, the problem is
on the motor, the problem is in the COMBIAX controller.
Traction motor output voltage error
Traction motor output voltage error
(low)
(low)
VMN LOW
VMN LOW
Cause 1: Startup test
Cause 1: Startup test
Before switching the main contactor on, the software checks the power bridge. It turns the high
Before switching the main contactor on, the
side power mosfets on one by one and expects the phase voltage to
side power mosfets on one by one
capacitor value. If the phase voltage does
capacitor value. If the phase voltage does not increase, this alarm occurs.
In such a case (the main contactor does not
In such a case (the main contactor does not close at all), check the following:
Motor internal connections (ohmic continuity)
Motor internal connections (ohmic continuity)
•
•
Motor power connections
Motor power connections
•
•
Motor leakage to the truck frame
Motor leakage to the truck frame
•
•
If the motor connections are OK, the problem is in the COMBIACX controller.
If the motor connections are OK, the
Cause 2: Motor running test
Cause 2: Motor running test
When the motor is running and the power bridge is on, the motor voltage feedback is tested. If
When the motor is running and the power bridge is on, the motor voltage feedback is tested. If
the motor voltage feedback is lower than
the motor voltage feedback is lower than commanded value, this alarm occurs.
In such a case, check the following:
In such a case, check the following:
Motor connections
Motor connections
•
•
Whether the motor's phase windings or cables have leakages towards the t
Whether the motor's phase windings or cables have leakages towards the truck frame
•
•
That the main contactor closes properly, with a
That the main contactor closes properly, with a good contact.
•
•
If no faults are found, the problem is in
If no faults are
found, the problem is in the COMBIACX controller.
https://www.forkliftpdfmanuals.com/
Document ID: 615023
Document ID: 615023
DESCRIPTION
DESCRIPTION
(Alarm)
(Alarm)
the pump motor is turning. The alarm indicates that the pump
wards the truck frame
in the COMBIAX controller.
(Alarm)
(Alarm)
software checks the power bridge. It turns the high
and expects the phase voltage to increase toward the rail
not increase, this alarm occurs.
close at all), check the following:
problem is in the COMBIACX controller.
commanded value, this alarm occurs.
good contact.
the COMBIACX controller.
156 (244)
156 (244)
Service Manual
Service
Manual
Stored
Stored
alarm indicates that the pump
Stored
Stored
increase toward the rail
ruck frame
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