Rheem GHE80SS Use & Care Manual page 44

Before You Call For Service...
Alarm ('A')
and Alert
('T') Codes
Check to see if leak sensor is installed in the bot-
T105 tom pan. Check wiring on connector P11 of the
ignition control board.
Communication lost between the display board
and the ignition control board. The ignition con-
trol board will continue to operate the heater us-
A108
ing the last known configuration settings. Check
wiring between the display and P5 of the ignition
control board.
CO sensor detects presence of carbon mon-
A109 oxide gas above the threshold limit. This will
disable the heater.
Monthly test of automatic shutoff valve (premium
A110 models only) was not completed properly. The
valve did not close in the allotted time.
Monthly test of automatic shutoff valve (premium
models only) was not completed properly. The
A111
valve did not open in the allotted time. This will
disable the heater.
Automatic shutoff valve (premium models only)
A112
is closed. This will disable the heater.
Peak flame rod current has deviated from the
startup average. This is indicative of degrada-
T113
tion of the flame rod (dirty, sooty). It needs to be
cleaned and inspected .
Peak flame rod current has deviated from the
T114 startup average by a significant amount. Clean
and inspect flame rod. Replace if necessary.
Monitored characteristics of the combustion sys-
A115 tem indicate degraded performance. Combustion
system needs to be inspected and serviced.
Monitored characteristics of the combustion
system indicate severely degraded performance.
A116
Combustion system needs to be inspected and
serviced.
Description
44
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 technical support.
A108 Ignition Board Communication Failure
->Communications lost with ignition control
board. If problem persists, contact technical sup-
port or service provider.
A109 External CO Sensor Alarm: Heater Dis-
abled
->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 troubleshoot-
ing, or contact technical support.