TROUBLESHOOTING – ERROR CODES
•
The Hydro-Smart 170 is self diagnostic for safety and convenience when trouble shooting.
•
If there is a problem with the installation or the unit, it will display a numerical error code on the
TM-RE30 (if installed) or on the 7-Seg LED at the bottom left corner of the computer board to
communicate the source of the problem.
•
Consult the following chart for the cause of each error code.
7-Seg LED
TM-RE30 (Optional)
Error
Code
Malfunction description
Error
Code
Malfunction description
Error
Code
Malfunction description
031
Dipswitch setting fault
321
Inlet Thermistor Failure
701
Computer board Fault
101
Warning for 991 Error
Code
331
Mixing Thermistor
Failure
721 False
Flame
Detection
111 Ignition
Failure 391
Air-fuel Ratio Rod
Failure
741
Miscommunication
between Hydro-Smart
170 and TM-RE30
121
Flame blows out
510
Abnormal Main and
Solenoid Gas Valve
991 Abnormal
burning
311
Output Thermistor
Failure
611
Fan Motor Fault
•
The 7-seg LED displays the 3-digit error codes one digit at a time. The TM-RE30 (if installed)
displays the whole 3-digit error code at once.
Example
If your unit has the “321” error code (inlet thermistor),
•
The 7-seg LED, will flash the 3-digit error codes one digit at a time. The 7-Seg LED will display
“3”…”2”…”1”, and then repeat the 3 digits.
•
The remote controller, however, will display “321” on its screen, in its entirety.
23