Specifications

TM040 16, 18 & 20L Continuous Flow Gas Water Heater Service Instructions
D.O.I: 2/06/2009
This document is stored and maintained electronically by Service. All printed copies not bearing this statement in RED are deemed “uncontrolled”
27
Displaying Maintenance Information
With Controller:
Isolate power whilst connecting a controller.
1. Fit controller if not already fitted.
2. Restore power supply and ensure the controller is turned on.
3. Press the temperature increase and decrease buttons simultaneously for 3 seconds.
4. Use the temperature decrease button to change the left digit (0→1etc.) in the controller
display to the required maintenance code identified from the maintenance table on
page 26.
5. Use the temperature increase button to change the right digit (E→F etc.) in the
controller display to the required maintenance code identified from the maintenance
table on page 26.
6. The maintenance code and the value of that code will alternate on the LED display of
the Controller.
7. Press the on/off button twice on the controller to cancel maintenance information.
Without Controller:
Voltages up to 240 volts will be present within the water heater, take care
not to touch wiring terminals. Use an insulated tool when operating the
DIP switch or MIN and MAX buttons.
If a controller is not fitted, the red LED on the PCB can be used to show error code history.
This method will only provide limited information regarding error codes. Specific
maintenance information as listed on page 26 is not available unless a controller is fitted.
1. If the unit is in a fault condition, the red LED on PCB will be flashing. Previous error
codes can be viewed by modifying the dip switch positions as below:
2. The red LED will flash in a
specific pattern. Refer to
adjacent chart in conjunction
with error code information on
page 24 to determine fault.
Dip
Switch
1
2
3
4
State of Display
State of
Switch
OFF
OFF
OFF
OFF
Normal Mode
ON
OFF
OFF
OFF
Latest Error Code
OFF
ON
OFF
OFF
2nd Error Code
ON
ON
OFF
OFF
3rd Error Code
0.5sec. 0.5sec. 3sec.
2sec. 0.2sec.
A
B
C
D
E
F
G
H