Technicolor - Thomson POWER & CONTROL TS 870 - Manual (Page 38)

TS 870 TRANSFER SWITCH
PM062 REV 8 10/01/25 34 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
Transfer to generator source without a
power failure in the utility source -
- A test mode has been activated (check TSC 80E status LED)
Utility supply voltage is slightly below voltage sensing
setpoints.
Verify TSC 80 has correct voltage configuration jumper setting
for system voltage or 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)
- Utility power switching device has tripped due to an over
current condition and TSC 80E “Transfer Fail” alarm activated
as indicated by flashing Load on Utility LED. Determine cause
of alarm and rectify before TSC 80E is reset.
Generator does not start up or stop
when it should - Verify remote engine control panel is set for automatic mode
No time delay when there should be - Verify time delay setting of the TSC 80E controller