32 RT-SVD03G-EN
ReliaTel Refrigeration Module (RTRM)
What the readings mean
HEAT FAIL and COOL FAIL at the same time, RTRM-J6-7 & 8 pulsing voltage: 1.
1. Coil temperature sensor is open or shorted. (Heat Pump)
2. Unit has failed to defrost properly. See Heat Pump section for further details.
3. Outdoor air sensor is open or shorted. (RTRM version 4.0 or greater.)
4. Dehumidification unit- RTOM disconnected or not communicating. RTOM will flash once every
few seconds.
5. Emergency stop input is open.
6. Factory installed phase monitor is indicating a fault
7. FrostStat Input Active
8. Smoke Detector Active
9. Entering Evaporator Temp. Failure (On Modulating Reheat Units)
10. RTDM Communication Failure (On Modulating Reheat Units)
Compressor will not run, no diagnostics:
1. Frostat trip (RTRM v8.0 and later will exhibit diagnostics as described above).
2. Compressor disable input open.
3. Unit is economizing, and outside air damper is not yet at 100%.
4. Unit is in heat mode or off mode.
5. Tracer or building management system is preventing compressor operation (demand limit).
Supply fan OFF, no diagnostic
Part Number – SEN01522
Mo
Alterning E1 and E2
flashing indicates a
“Heat Failure and Cool”
Failure diagnsotic
Cool LED
Heat LED
Part Number – SEN01522
AM
Mo
Heat Fail - Cool Fail Diagnostic
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