Rheem RTGH-RH11DV - Chapter 3: Error Code Handling; Error Mode Display and Clearing; Troubleshooting Er:10, Er:11, Er:16

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If hot water is not used for more than thirty (30) hours, the recirculation program will be stopped and the water heater will
automatically go into Vacation Mode and display the vacation icon .
▪ J.ERRORMODE
When the water heater encounters an error, the display will ash “Er” followed by a numerical code. The water
heater shall enter a soft lockout condition if the error is such that it can return to normal operation once the
condition relieves itself (overheat conditions, NTC open or shorts, etc.).
The water heater shall enter a hard lockout if the condition indicates something more serious (ame, ignition,
condensate line, etc.) To clear a hard lockout Error Code, press the Power button. The following screen will
display when the water heater encounters an error.
Figure 49 – Error Mode Screen
Error Code Error Code Description Possible Remedies
Er:10
Flame has been lost Eight
(8) Times
Press the Power button to clear the Error Code.
If Error happens again:
1. Monitor the gas pressure to the water heater while in operation.
Ensure pressure is between 5.0" W.C and 13.0" W.C (1.25 to 3.24
kPa).
2. Check gas valve wire. Ensure connection is secure.
3. Check ame detection sensor. Ensure connections are secure.
Normal operating settings are more than 2.5DC before ignition, less
than 2.5DC after ignition.
4. Check igniter transformer for proper connection.
5. Clean the spark igniter with steel wool to remove oxides. Ensure
proper separation (3-4 mm).
6. Replace the spark igniter if damaged.
7. Assure that the ame is stable when lit.
8. If the problem persists, replace the main control.
Er:11
Ignition has Failed 10 (Ten)
Times
Press the Power button to clear the Error Code.
If Error happens again:
1. Monitor the gas pressure to the water heater while in operation.
Ensure pressure is between 5.0" W.C and 13.0" W.C (1.25 to 3.24
kPa).
2. Check gas valve wire. Ensure connection is secure.
3. Check ame detection sensor. Ensure connections are secure.
Normal operating settings are more than 2.5DC before ignition, less
than 2.5DC after ignition.
4. Check igniter transformer for proper connection.
5. Clean the spark igniter with steel wool to remove oxides. Ensure
proper separation (3-4 mm).
6. Replace the spark igniter if damaged.
7. Assure that the ame is stable when lit.
8. If the problem persists, replace the main control.
Er:16
Operating Temperature
Sensor or DHW Sensor
detects Water Temperature
Greater than 199°F (93°C)
This Error Code will go away when the DHW temperature decreases.
If Error happens again:
1. Check if dip switch High Fire setting is ON. Switches 6 and 7
should be OFF for normal operation.
2. Check if DHW pipe is blocked. Ensure there is enough water
owing to the water heater.
3. Check DHW sensor at DHW outlet. If resistance is zero, replace
the sensor.
4. Check Operating Temperature sensor at the heat exchanger. If
resistance is zero, replace the sensor.
5. If the problem persists, replace the main control.
Chapter3HowtoUseTheControlPanel