Error Codes - Rheem RTG2-42 Troubleshooting Manual

1. Turn off remote control. Leave the unit plugged into a 120 VAC power source.
2. Turn off the gas and water shutoff valves.
3. Remove the front cover.
4. Find the DIP Switch #4 located at the top left hand side of the PCB.
5. Change the DIP Switch #4 setting to the "ON" position. DO NOT alter any other DIP
Switch. The LED on the PCB is on. At the same time, the display of the Main Remote
Control is on continuously.
6. Press the "SW1" Button on the left hand side of the PCB for more than 1 second. The
LED on the PCB starts flashing. At the same time, the display of the Main Remote
Control starts to flash.
7. Change the DIP Switch #4 setting back to the "OFF" position. DO NOT alter any other
DIP Switch. The LED on the PCB will stop flashing. At the same time, the display of the
Main Remote Control will turn off.
8. Attach the unit's front cover.
9. Turn on the remote control, gas and water shutoff valves.
Check and ensure safe operation and performance of the water heater.
10.

Error Codes

Code Fault
00 1 Hour continuous combustion
(First generation products only –
mfg date thru Jul 06)
03 MIC 180 and EZ Link Only
05 Imperfect Combustion Alarm
10
Warning or Predictive Code –
not a fault code.
Air Supply or Exhaust Blockage
11 No Ignition
Flame Failure (had main burner,
12
then lost it)
SVC 810 Tankless Troubleshooting Manual
Close all hot water taps to reset unit.
Turn off, or remove circulation pumps (unit is not designed for
continuous operation with circulation systems).
Check communications cable.
Check #4 dip switch setting to ON position.
Clean air inlet filter.
Clean combustion air fan.
Clean heat exchanger fins.
Check for adequate combustion air ventilation openings and clean if
necessary.
Check vent system for partial blockage and correct as necessary.
Check all vent components for proper connections.
Check that nothing is blocking the flue inlet or exhaust.
Ensure condensation trap/drain was installed correctly.
Ensure heat exchanger fins, fan, and air intake are not blocked.
Ensure you have gas to the appliance and valves are turned ON.
Ensure gas type and pressure is correct.
Bleed all air from gas lines.
Ensure gas line, meter, and regulator are sized properly.
Ensure appliance is properly grounded.
Check gas solenoid valves for open or short circuits.
Ensure igniter is operational.
Check igniter wiring harness for damage.
Ensure gas type and pressure is correct.
Bleed all air from gas lines.
Ensure flame rod wire is connected.
Check flame rod for carbon build-up.
Ensure gas line, meter, and regulator are sized properly.
15
Remedy