2100-444-003A
Page 83
The TCS22 requires minimal maintenance. Once every 4 years replace the battery under the
controller cover. This battery powers the hardware clock during power outages.
Check sensor calibration once every two years.
7.2 Troubleshooting 7.2.1 TCS22 TROUBLESHOOTING
Problem Check Out Points Procedure TCS22 Fails to operate Check 240 Volt Power
Check TCS22 Circuit breaker
Check 24 Volt Power Remove power connector from
controller and Check for 24 volt Power
from pin 1 to pin 3 on plug
Check Internal Fuse Remove screws from the four corner of
the front panel of the controller. The
fuse is located in upper left hand corner
of the controller.
Blower #1 light is On but
Blower fails to operate Check A/C unit 24 Volt power
from C to G
Check controller switch Remove junction connector J5. Check
for continuity from pin #3 to pin #6 on
controller with the Blower light ON.
Check wiring and connections
Compressor #1 light is On but
Compressor fails to operate Check A/C unit 24 Volt power
from C to Y
Check controller switch Remove junction connector J5. Check
for continuity from pin #2 to pin #5 on
controller with the Compressor light
ON.
Check wiring and connections
Heater #1 light is On but
Heater fails to operate Check A/C unit 24 Volt power
from C to W1
Check controller switch Remove junction connector J5. Check
for continuity from pin #8 to pin #11 on
controller with the Compressor light
ON.
Check wiring and connections
Economizer #1 light is On but
Economizer fails to operate Check controller switch Disconnect E from the terminal strip on
the TCS22. Check for continuit
y
from E