Troubleshooting
MERGE 10-15
Chapter 10
is not fit
4、 The extreme work condition
5 HPD HPD failure
1、 The order of direction and
throttle is wrong
2、 Choose wrong HPD type
3、 Wrong adjustment on the
throttle potentiometer
4、 Order delay is too short
6 RELAY COIL FAULT Time-delay coil failure
1 、 wrong connection on the
time-delay coil
7 RELAY DRIVER OFF
Time-delay coil over
currency
1、short circuit on the time-delay
coil
8 RELAY DRIVER ON
Time-delay coil less
currency
1 、 time-delay coil is off or
damaged
9 CIRCUIT BRKR OPEN
Antislip circuit is open circuit
or fuse is damage
1、 Fuse is broken
2、 Antislip circuit failure
3、 Speed sensor failure
10 MAIN WELDED Main contactor welded
1、 Main contactor is welded
2、 The drive of main contactor
is short
11 WELDED AUX CONT Auxiliary contactor welded
1、 Auxiliary contactor is welded
2、 The drive of auxiliary
contactor is short
12 SPEED SENSOR FAULT Speed sensor failure
1、 No connection on the speed
sensor
2、 Speed sensor is broken
13 MAIN DRIVER ON
The drive input of main
contactor is less currency
1、 Main contactor failure or
open circuit
2、 controller is broken
14 MAIN COIL FAULT
The coil of main contactor is
failure
1、The coil of main contactor is
open or disconnect
15
MAIN DROPOUT
Main contactor is open
1、main contactor is broken
16
MOTOR STALL
Motor failure
1、 incorrect installation of the
motor
2、 Motor stall
3、 EM brake cable is fault
4、 Speed sensor is broken
17
MAIN DRIVER OFF
Driving output on main
contactor is over currency
1、 Main contactor failure or coil
is short circuit.
2、 Controller is broken
18
AUX CONT DN
Auxiliary contactor is open
1 、 the driving of auxiliary
contactor is short circuit
19
KEY SWITCH SRO
Key switch SRO failure
1、 Interlock on the key switch
and the order delay is wrong
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