Rheem IKONIC RTGH-S11i Training And Service Manual page 65

ERROR CODE DIAGNOSTICS
2.2 ERROR CODE LIST
T113 ERROR CODE
The flow rate is less than 0.4 GPM through the water
heater and the heater is not activating. The water heat-
er displays the " T113 " error code on the on the user
interface.
This water heater needs a minimum 0.4 GPM flow rate
to activate the water heater.
To check the water flow rate through the unit, refer to
section "1.5.1 Tankless Status".
Diagnostic check items
• Not enough water flow
• Water supply line (Hot and Cold)
• Water filter
65
IKONIC Tankless Water Heater Service Manual
Check method
• The water filter and the hot & cold supply line may
have a blockage.
Check the water filter located the inlet water con-
nection, and the hot & cold water supply lines. If
these filter or supply lines have a blockage, please
clean them to remove the blockage.
• The water line in this unit may be blocked by scale,
so the unit must be drained and flushed.
To flush the unit, please refer to section "A018 error
code Lime build up detected in heat exchanger".
• The water flow sensor in this unit may not work
properly.
When a faucet is opened to flow water enough, if
the unit cannot detect the water flow over than 0.4
GPM, please replace the water valve and control
board.