ABB PS D75 840 Series Installation And Maintenance Instruction page 23

Version PS D without a built in electronic overload
Fault code
F1+F2
Occurs when closing terminal 8 and 9 ( gives the start signal)
No
Occurs when ramping up
No
When reaching top of ramp
No
During cont. run
During ramp down
PF is On
Yes
Switch PF off
Make a new start
By-pass contactor used?
Yes
No Yes
Is the switch PF on?
No Yes
Switch off PF
No
Short interuptions in the
supply network
No fault
Faulty P.C.B
Fault code
Over temp. heatsink
No overtemp.
Faulty temp. sensor
(check by disconnecting
the sensor from the main P.C.B)
Still F2 signal
Faulty P.C.B
Yes
Is the switch PF on?
No
Possible to run?
( with fault signal )
Yes
Shorted thyristor
Open motor circuit
Non conducting thyristor
F2
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Switch off PF
Yes
No
No fault