Trane ReliaTel Diagnostic Manual page 30

ReliaTel Refrigeration Module (RTRM)
Cool Diagnostic
What the readings mean
Cooling-RTRM-J6-8.
ON – System is in the cooling mode and actively cooling. The unit could be economizing or have
one or both compressors on. If the unit is a heat pump, the reversing valve is energized as well.
OFF – System is not actively cooling. It may or may not be in the cooling mode.
PULSING – This indicator can mean one or more of the following:
Any controls
1. CC1 or CC2 opens during cooling, or is open when a call for compressor occurs. The unaffected
2. CPR1 Disable or CPR 2 Disable input has opened during a compressor cycle each time a
3. Supply Air Temperature is invalid and unit is VAV or CV with Modulating Reheat.
Mechanical ZSM
1. Zone temperature input failure after a successful input.
2. Both heating and cooling setpoint inputs have failed or are not attached (such as when using
Programmable ZSM
The ZSM has failed to communicate for 15 consecutive minutes after successful communication
has occurred.
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circuit will still run. With RTRM version 4.0 or greater, CC1 or CC2 circuit must open on 3
consecutive cycles. On the 4th trip, the unit will lockout.
compressor starts (within the first 3 minutes) for 3 consecutive cycles. It locks out on the fourth
cycle. The unaffected circuit will still run.
a 2 - wire sensor on terminals 1 & 2).
Snowflake flashing indicates
active cooling mode
E2 flashing indicates a COOL FAIL
Cool LED
Mo
RT-SVD03G-EN