Technicolor - Thomson POWER & CONTROL TS 870 - Manual (Page 39)

TS 870 TRANSFER SWITCH
PM062 REV 8 10/01/25 35 Thomson Technology
Symptom Possible Causes
Will not re-transfer to utility source
upon restoration - Isolation plug out
- Utility disconnect switch is in the de-energized position
(Service Entrance Rated ATS). Switch to the Energized
position.
- A test mode has been activated (check TSC 80E status LED)
- Utility voltage is below the pre-programmed limits (check utility
source for adequate voltage)
- A loose control connection
- Faulty motor limit switch
- Defective motor
- TSC 80E has incorrect voltage setting as set via software
programming
- Defective TSC 80E controller (verify output signals with circuit
board mounted diagnostic LED’s)
- TSC 80E has “Transfer Fail” alarm activated as indicated by
flashing Load on Utility LED. Determine cause of alarm and
rectify before TSC 80E is reset
Will not transfer to generator source
upon failure of utility source - Isolation plug out
- Generator set not producing enough voltage/frequency or
output circuit breaker open
- TSC 80E has incorrect voltage setting as set via software
programming
- Warm-up time delay function has not timed out yet (verify
TSC 80E timer setting)
- A loose control connection
- Faulty motor limit switch
- Defective motor
- Defective TSC 80E controller (verify output signals with circuit
board mounted diagnostic LED’s)
- TSC 80E has “Transfer Fail” alarm activated as indicated by
flashing Load on Generator LED. Determine cause of alarm
and rectify before TSC 80E is reset
Power is not available at the load
terminals but the utility or generator
power switching device
appears to be
closed to a live source
- The power switching device's over current protection unit has
opened due to a fault on the system. Correct the fault, and
manually reset the power switching device
in the transfer
switch by moving it off and then on again with the manual
operating handle
- Limit switch incorrectly adjusted
The transfer switch has completed a
transfer, but the motor has overheated and
the internal thermal protector has opened -
-
Limit switch failure or improper adjustment has failed to
disconnect motor
Binding or jamming of the transfer mechanism