Rheem GHE80SU Use & Care Manual page 47

Before You Call For Service...
Alarm ('A')
and Alert
('T') Codes
Check to see if leak sensor is installed in the bottom
T105 pan. Check wiring on connector P11 of the ignition
control board.
Communication lost between the display board and the
ignition control board. The ignition control board will
A108 continue to operate the heater using the last known
configuration settings. Check wiring between the dis-
play and P5 of the ignition control board.
CO sensor detects presence of carbon monoxide gas
A109
above the threshold limit. This will disable the heater.
Monthly test of automatic shutoff valve (premium mod-
A110 els only) was not completed properly. The valve did not
close in the allotted time.
Monthly test of automatic shutoff valve (premium mod-
A111 els only) was not completed properly. The valve did not
open in the allotted time. This will disable the heater.
Automatic shutoff valve (premium models only) is
A112
closed. This will disable the heater.
Peak flame rod current has deviated from the startup
T113 average. This is indicative of degradation of the flame
rod (dirty, sooty). It needs to be cleaned and inspected .
Peak flame rod current has deviated from the startup
T114 average by a significant amount. Clean and inspect
flame rod. Replace if necessary.
Monitored characteristics of the combustion system
A115 indicate degraded performance. Combustion system
needs to be inspected and serviced.
Monitored characteristics of the combustion system
A116 indicate severely degraded performance. Combustion
system needs to be inspected and serviced.
Description
47
Current Alarm Screen Display
T105 Water Leak Sensor Not Installed
->Check water leak sensor connection. Refer to use
and care manual for troubleshooting, or contact techni-
cal support.
A108 Ignition Board Communication Failure
->Communications lost with ignition control board.
If problem persists, contact technical support or service
provider.
A109 External CO Sensor Alarm: Heater Disabled
->Immediately contact a qualified service provider.
A110 Shutoff Valve Test Close Error
->Auto Shutoff valve failed to close during test
cycle. Please contact technical support or service
provider.
A111 Shutoff Valve Test Open Error
->Water heater has been disabled. Manually open
valve. Please contact technical support or service
provider.
A112 Shutoff Valve Not Open: Heating Disabled
->Manually open valve if no water detected or if
unit is not being serviced. Contact technical support or
service provider.
T113 Flame Rod Degraded and Needs Servicing
->Clean or replace per use and care manual.
Please contact technical support for assistance.
T114 Flame Rod Degraded and Needs Servicing
->Clean or replace per use and care manual.
Please contact technical support for assistance.
T115 Combustion Health Degraded: Needs Service
->Combustion system performance is degraded.
Please contact technical support or service provider for
assistance.
T116 Combustion Health Degraded. Needs Service
->Clear error code by pressing clear button. Refer
to use and care manual for troubleshooting, or contact
technical support.