Cleaning The Heat Exchanger; Trouble Shooting - Takagi MOBIUS Installation And Operation Instruction Manual

Cleaning the Heat Exchanger

If the heat exchanger must be cleaned, follow this procedure.
1. Shut off all power to the water heater.
2. Use re-circulation method.
3. Wear Gloves when handling de-scaling solution.
4. Always ware EYE PROTECTION.
5. All equipment being de-scaled should be properly vented to prevent gas pressure
build-up during the cleaning operation.
6. Clean out any debris, which has fallen to the coldwater inlet filter.
MOBIUS Water Heater Troubleshooting:
The MOBIUS Water Heater Model T-M1 has a built in self-diagnostic computer mode for
safety and convenience in case of necessary maintenance service.
Trouble Shooting Flow chart:
The MOBIUS water heater is one of the most trouble free water heaters there are.
However, if there is trouble, use the error code on the computer to follow this trouble shooting
flow chart.
On the T-M1 computer board, a numeric error code will
appear when the MOBIUS water heater has a problem. This
error code will identify the symptoms of the problem and
indicate what service is necessary.
The T-M1 consists of five main systems.
temperature control, the gas control, the water control, the
burner control, and the main computer control systems.
Error N0.
031,141,711,741,
751
701
111, 121
311, 321,331
391,611,721,991
501
651, 661,541
101
211
Component
Main Computer Control
Temperature Control (Setting Temp.
+ over 50 ° F)
Burner Flame
Temperature control
Burner control
Gas control
Water control
Combustible Air
Vent pipe
These are the