Rheem Iconic RTGH-S11i Training And Service Manual page 45

ERROR CODE DIAGNOSTICS
2.2 ERROR CODE LIST
A012 ERROR CODE
Unit Detected Flame and Lost It.
If the water heater detects loss of flame during combus-
tion, the water heater stops supplying fuel, attempts to
restart, counts the incidents of flame loss. If the inci-
dent occurs 15 times consecutively, the water heater
displays the "A012" error code on the Liquid Crystal
Display (LCD) on the User Interface.
Diagnostic check items.
• Gas supply pressure
• Gas filter
• Air filter
• Venting
• Flame rod
• Gas air ratio valve
• Solenoid valve (SV)
Check method
Gas supply pressure
1. Check the gas supply pressure at the gas connec-
tion of the water heater.
The correct gas pressure are below;
• Natural Gas (NG); 4.0" 10.0" W.C.
• Liquid Propane (LP); 8.0" 13.0" W.C.
2. While the static pressure is normal, the use of an-
other gas appliance may cause a possible drop to
the water heater. Therefore, it is required to check
the dynamic pressure.
• Static pressure: Gas pressure during standby.
• Dynamic pressure: Gas pressure at max combus-
tion.
To set to max combustion, please refer to section "1.4.2
Setting operation mode" in this manual.
45
IKONIC Tankless Water Heater Service Manual
Gas filter
Check with the gas filter at the gas connection of the
water heater that filter is not closed by some foreign
substance.
If the gas filter is closed by something, clean the gas
filter and remove the cause to be closing the gas filter.
Air filter
Check with the air filter at the inlet air connection of the
water heater that filter is not closed by some foreign
substance.
If the air filter is closed by something, clean the air filter
and remove the cause to be closing the air filter.