TSC 800 TRANSFER SWITCH CONTROLLER
PM 049 REV 9 06/04/24 Thomson Technology
81
Symptom Possible Causes
Oscillating/unstable voltage
readings displayed for one or more
sources when measured voltage
with an independent meter
confirms stable voltage (cont’d)
-
Defective TSC 800 controller. Contact Thomson Technology
for replacement.
*
TSC 800 Displays voltage values
well in excess of actual
-
The wrong voltage sensing ratio has been programmed
-
Secondary power transformers used for sensing are
installed improperly. Polarities of PT’s were not observed
during installation/replacement. Contact the factory for
assistance.
-
Defective TSC 800 controller. Contact Thomson Technology
for replacement.
TSC 800 Transfer Fail Displayed
Limit switch or auxiliary contact not closed to signal TSC
800 of ATS in correct position
Load bus voltage not sensed at the TSC 800 controller to
confirm load bus is energised
“Max Transfer Fail Time” or “Max Find Neutral Time” or set
too low
- Max Transfer Fail Time: Set for 15 seconds or greater on
MCS style ATS, or 3 seconds on ICS style ATS
- Max Find Neutral Time: Set for 6.0 seconds for MCS style
ATS or 0.0 seconds for ICS style ATS.
On ICS style ATS both NDT & Delayed Transfer Output
Timers have time applied.
-NDT: set to 0 seconds
- Delayed Transfer Output: set to required neutral delay time
On ICS style ATS both NDT & Delayed Transfer Outputs
timers set to 0 seconds.
- Delayed Transfer Output: must be set for minimum of 0.2
seconds
12. REPLACEMENT PARTS
Replacement parts are available for the TSC 800 controller as follows:
TSC 800 Controller Board P/N 002661
TSC 800 115V Selector Plug P/N 002633 (2 required)
TSC 800 230V Selector Plug P/N 002634 (2 required)
TSC 800 Lexan Faceplate P/N 001599 (Standard 5.5”X5.5” Lexan)
TSC 800 Rear Cover P/N 001073
TSC 800 LCD P/N 000559
TSC 800 LCD connector P/N 000264
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