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Rheem GHE100-400 User Manual

Rheem GHE100-400
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39
Triton Service Manual SVC1020T ; Rev 4
80 and 100 gallon chassis
Troubleshooting Error Codes
Error A028 Flame Present W/O Heating
This alarm means the control board detected a flame signal 10 seconds after the gas valve had closed from the last
heating cycle.
Check for flame through the sight glass. If flame is present with this code, either the gas valve needs to be replaced
or gas pressure to unit is above maximum stated on rating label.
Make sure the heater has a solid earth ground at the electrical connection box on top of
the unit; and the electrical connection to the power supply has a solid earth ground.
Remove and clean the igniter and flame rod then reinstall. Allow the unit to go through a heating cycle to see if the
error occurs again. If error occurs and no flame is visible through the sight glass, replace the flame rod.
If flame rod is replaced and error continues, replace the ignition control board.
Error A029 Failed Ignition
The unit will fail nine times and give an A029. It will fail 9 more times and give an A029. On the 27
th
failure, the unit
will lock out with an A001 code.
Refer to Error A001 for troubleshooting. (See Page 31)
Error A030 Flame Lost During Heating
This code means the unit lost flame signal during heating. The unit will attempt to heat 3 times in 3 consecutive cycles.
After the 3
rd
try, the unit will lock out with a code A002
Refer to Error Code A002 for troubleshooting.
Error A031 Loss of Anode Communication
This error code means there is a loss of Anode communication. This will not disable the water heater or keep it from
heating.
Check the connections between anode control and ignition control.
Check the harness for proper connections.
If error code is still present, replace the anode control
If error is still present after replacement, replace the ignition control board.
Error A033 through A043 Relay/Communication Errors
All of these codes are related to ignition control failure.
Cycle power and attempt to clear alarm. If alarm does not clear, replace ignition control board.
Error A044 Processor Clock/Line Frequency Disagree
If power line frequency is below 45 Hz or above 65 Hz for more than 5 seconds the control issues a fault code and
cancels demand for heat. Operation resumes and fault clears when power line frequency returns within the range
of 47 to 63Hz.
Cycle power and attempt to clear alarm.
If alarm does not clear, have electrician verify power supply Hertz rate is within the required 45-65 Hz range

Table of Contents

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Rheem GHE100-400 Specifications

General IconGeneral
BrandRheem
ModelGHE100-400
CategoryWater Heater
LanguageEnglish

Summary

Introduction to Triton Water Heaters

Water Heater Safety Precautions

Covers electrical shock and flammable liquid hazards.

Water Temperature and Scalding Risks

Guidance on setting water temperature and scald prevention.

TRITON Water Heater Specifications

Wiring and Schematic Diagrams

User Interface Navigation and Setup

User Interface Settings Configuration

User Interface Status and Service Menus

Service Menu for Alarms and System Health

Accessing alarms, system health, and service alerts.

User Interface Alarm and Health Monitoring

Alarm and Alarm History Functions

Viewing and clearing current and past alarms.

System Health and Service Alerts

Monitoring system health and setting maintenance alerts.

Sequence of Events: Ignition and Heating

Sequence of Events: Flame Stabilization

Sequence of Events: Post-Purge and Modulation

Sequence of Operations: Power On and Call for Heat

Sequence of Operations: Pre-Purge to Burner Operation

Safety Functions of Water Heater Controls

Flame Detection and ECO Cut-Off

Flame rectification for stability and ECO switch for over-temperature.

Pressure Switches and Vent Temperature Sensor

Role of pressure switches and vent temp sensor in safety.

Control System Safety Features

Error Codes: Overview and List (A001-A026)

Error Codes: List (A027-A110)

Error Codes: List (A111-T137)

Error Codes: List (T130-T137)

Troubleshooting Error Code A001: Ignition Lockout

Troubleshooting A001: Gas Valve Checks

Troubleshooting Error Codes A002 and A003

Error A002: Flame Stability Issues

Diagnosing and resolving unstable flame conditions.

Troubleshooting Error Codes A004, A005, A006

Troubleshooting Error Codes A007 through A016

Troubleshooting Error Code A017: High Flue Temperature

Troubleshooting Flue and Tank Sensor Errors

Errors A018 & A019: Flue Temperature Sensor

Troubleshooting open or shorted flue temperature sensors.

Error A022: Upper Tank Sensor Open

Diagnosing an open upper tank temperature sensor.

Troubleshooting Tank Sensor and Blower Errors

Errors A023 & A024: Upper Tank Sensor Issues

Troubleshooting hot tank temp and shorted upper tank sensor.

Errors A025 & A026: Blower RPM Feedback

Diagnosing no blower RPM feedback or RPM mismatch.

Error A027: Flame Present Before Ignition

Troubleshooting flame detected before ignition.

Troubleshooting Flame and Communication Errors

Errors A028-A030: Flame Detection Issues

Troubleshooting flame presence without heating or lost flame.

Troubleshooting Configuration and System Errors

Troubleshooting Valve and Sensor Errors

Errors T009, T020, T021: Gas and Tank Sensor Errors

Diagnosing no gas detected and tank sensor issues.

Troubleshooting Ignition, Maintenance, and Sensor Errors

Troubleshooting Anode Controller and Alerts

Error T122: Anode Controller Communication Failure

Troubleshooting communication loss with the anode controller.

Detailed Anode Troubleshooting Procedures

Gas Pressure Checking Procedures

Gas Valve Adjustment Procedure

Triton Disassembly and Repair: Burner Assembly Replacement

Leak Guard™: Operation and Troubleshooting

What is LeakGuard™?

Explanation of the auto shut-off leak detection system.

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