12/03/2012
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GI301
Operational Indicators
Front Panel LEDs:
POWER ON (Green LED
)
ON Solid – Normal
Pulsing – Bad sensor
1 blinks every 2 seconds - Bad ST sensor
2 blinks every 2 seconds - Bad DDT sensor
3 blinks every 2 seconds - Bad LWT sensor
4 blinks every 2 seconds - Bad CDT sensor
HP STAGE 1 (Bicolor LED)
RED
- Heating Mode:
ON Solid - Stat Y input is active.
Pulsing - ACD is timing. (anti-cycle delay timer)
Normal compressor delay at start up or a delay to allow refrigerant pressures or
temperature sensors to reach a normal starting pressure or operating temperature range.
GREEN
- Cooling Mode:
ON Solid - Stat Y input is active.
Pulsing - ACD is timing. (anti-cycle delay timer)
Normal compressor delay at start up or a delay to allow refrigerant pressures or
temperature sensors to reach a normal starting pressure or operating temperature range.
HP STAGE 2 (Yellow LED)
ON Solid - HP-Y2 is running.
AUX HEAT (Yellow LED)
(
Not used on the TST units)
ON Solid - AUX is ON.
Comment – three AUX LEDs on the inside of the board indicate how many stages of electric
heat have been activated.
Pulsing - Open safety limit.
The primary high temp limit has opened in the electric heat module.
Summary of Contents for TST-***
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