Troubleshooting
RT-SVX46G-EN 55
• 4 Flashes: RA Temp Sensor
• 5 Flashes: OA Quality Sensor
• 6 Flashes: OA Humidity Sensor
• 7 Flashes: OA Temp Sensor
• 8 Flashes: MA Temp Sensor
• 9 Flashes: RAM Fault
• 10 Flashes: ROM Fault
• 11 Flashes: EEPROM Fault
Heating Failure
Verify Heat Failure by Ignition Module (IGN) LED indicator:
• OFF: No Power or Failure
• ON: Normal
• Slow Flash: Normal, Heat Call
• Fast Flash: Error Code:
1 Flash: No Communication
2 Flashes: System Lockout
3 Flashes: Pressure Switch Fail
4 Flashes: TC01 or TC02 Open
5 Flashes: Flame w/o Gas Valve
6 Flashes: Flame Rollout Open
Cooling Failure
• Cooling and heating set point (slide pot) on the
thermostat has failed.
• CC1 or CC2 24 Vac control circuit ha
s opened, check
CC1 and CC2 coils, and any of the controls below that
apply to the unit (HPC1, HPC2, LPC1, LPC2, Frostat™).
Resetting Cooling and Ignition Lockouts
Cooling failures and ignition lockouts are reset in an
identical manner. Method 1 explains resetting the system
from the space; Method 2 explains resetting the system at
the unit.
Method 1
To reset the system from the space, turn the “Mode”
selection switch at the thermostat to the “Off” position.
After approximately 30 seconds, turn the “Mode”
selection switch to the desired mode, i.e. Heat, Cool or
Auto.
Method 2
To reset the system at the unit, cycle the unit power by
turning the disconnect switch “Off” and then “On”.
Compressor Inverter Drive
Refer to RT-SVD05*-EN (for VF-S15 inverters, refer to RT-
SVD007*-EN) for compressor inverter drive
troubleshooting information.
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