Takagi Mobius Water Heater T-M32 ASME Installation Manual And Owner's Manual page 38

TROUBLESHOOTING – ERROR CODES
•
All Takagi units are 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 of the central computer board and section computer
board to communicate the source of the problem.
•
Consult the following chart for the cause of each error code.
7-Seg LED
Error
Malfunction description
Code
031 Dipswitch Setting fault
101 Warning for 991 Error Code
111 Ignition Failure
121
Flame blows out
311 Output Thermistor Failure
321
Inlet Thermistor Failure
331 Mixing Thermistor Failure
Single Unit
•
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 code 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.
Remote
Error
Malfunction
Code description
391 Air-fuel Ratio Rod Failure
441 Flow Sensor Failure
Abnormal Main Gas
510
Valve
Abnormal Gas Solenoid
551
Valve
611 Fan Motor Fault
631
Abnormal External Pump
Water Control Valve Fault
651 (Flow Adjustment
function)
Easy Link
•
The 7-Seg LED on the Master unit displays a 5-digit
number to signify which unit in the Easy Link system
has the error, and what the error code is. The 7-Seg
LED displays the number one digit at a time.
•
The TM-RE30 (if installed) displays a 3-digit number
which also signifies which unit has the error, and what
the error code is.
•
The unit that has the error in an Easy Link system will
display the error code on its 7-Seg LED in exactly the
same way as if it were only a Single Unit.
Example:
If Unit #2 has the "321" error code (inlet thermistor),
•
The 7-Seg LED on the Master unit will display "3"...
"2"... "1"... "0"... "2", displaying only one digit at a
time. The first 3 numbers indicate the error code.
The last two numbers indicate that Unit #2 has the
error.
•
The remote controller, however, will display "232" on
its screen in its entirety. The first "2" indicates that
Unit #2 has the error. The "32" indicates the first two
digits of the "321" error code.
•
The 7-Seg LED on Unit #2 will display "3".... "2"....
"1", just like in the Single Unit example.
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TM-RE30 (Optional)
Error
Malfunction
Code description
Water Control Valve Fault
661
(Bypass function)
701 Computer board Fault
721 False Flame Detection
Miscommunication between
741
T-M32 and TM-RE30
Miscommunication in Easy
761
link OR Multi-unit system
991
Abnormal burning