Instructions / Assembly

30
Troubleshooting Alarm Codes
Code Troubleshoong Guide Possible Causes What to Do
T131 Clean Filter Reminder
Air lter roune maintenance
reminder
1. Set mode to Electric or OFF.
2. Remove air lters and clean by washing
with a mild detergent.
3. Dry air lter and reinstall.
4. Set unit to desired mode.
T132 Water Heater diculty sasfying demand
Water heater can not sasfy de-
mand
1. Check for open faucets.
2. Check for water leaks.
3. If none present, unit may be improperly
sized.
A120 Shuto Valve Can’t Close Error
Shut-O Valve malfuncon
1. Check connecons of the wiring.
2. Unplug and plug back the Shut-O
valve.
3. If alarm persist, call customer service.
A121 Shuto Valve Can’t Open Error
A122 Shuto Valve Inputs in Error
A123 Shut-O Valve Not Installed
A200 High Water Temp! [ECO] Call Tech Service ECO Tripped. Heater Disabled
1. Disconnect power to unit.
2. Check elements from screw to ground.
3. Check resistance to thermistors.
4. If the issue is neither the elements or
thermistor, replace board.
T300 Water vor Not Installed Water Leak Sensor Not Installed
1. Check to ensure water leak sensor is
installed.
2. Check wiring connecons to sensor
from board.
3. Check resistance to sensor to deter-
mine whether sensor or board should
be replaced (See ohm reading chart for
correct readings).
A502 Time Clock needs to be programmed
Controller malfuncon. Heater
disabled.
Replace Control Board
A503 Time Clock not advancing me properly
T504 WiFi Chip Communicaon Error
A900 Controller Fault: Call Tech Service
T901 Controller Fault: Call Tech Service
A902 Controller Fault: Call Tech Service
A903 Controller Fault: Call Tech Service
A904 Controller Fault: Call Tech Service
A905 Controller Fault: Call Tech Service
A906 Power Board Temp. Protecon Sensor Failure Controller geng too hot.