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b. The display will scroll through all configuration settings.
c. The display will co ntinue to scroll unt il either the UP or DOWN b utton is
pressed and will then return to normal display mode.
6. Power Rate Display
a. The decimal point in the display’s rightmost digit is a visual indicator of how
much power is required to meet the demand. A blinking decimal point
indicates that the triac is being sent a signal to energize and thus turn the
element on. The decimal point light will blink at a faster rate as the controller is
calling for more heat. When the unit is calling for full power the light is solid.
b. If the amount of power required exceeds the capacity of the heater, then the
entire display will intermittently flash. (Note that the display will only flash
when the display configuration is set to ‘dSP1’.)
7. Cost Calculator – Allows the user to view the amount of power and hot water
consumed and the cost of operation.
a. To display the Cost Cal culator values, when in normal display m ode press and
release the UP and DOWN buttons simultaneously three times.
b. The display will scroll through the Cost Calculator Values since last reset
i. C###, where ### equals the total cost of operation
ii. ####, where #### equals the total number of kW·Hrs consumed
iii. H0##, where ## equals water usage up to the ten thousands place,
followed by h###, where ### equals water usage up to the hundreds
place. Example: H012, h345 equals 12,345 gallons of water used.
iv. To reset these values to 0, press and hold the UP and DOWN buttons
simultaneously for 5 seconds. When the display shows ‘0000’, the cost
calculator has been reset.
c. To enter a specific cost per kW·Hr value, while displaying the Cost Calculator
values above press and release the UP and DOWN buttons simultaneously.
i. The display shows the cost per kW·Hr as #.### (Factory Default 0.114)
ii. Press the UP or DOWN button to adjust the cost per kW·Hr. Holding the
UP or DOWN buttons will fast scroll.
iii. Press the UP and DOWN buttons simultaneously to lock in the cost per
kW·Hr.
iv. Press the UP or DOWN button to return to Cost Calculator values.
v. Press the UP or DOWN button to return to normal display mode.
8. Error Code
a. Err1, indicates a failure of element #1
b. Err2, indicates a failure of element #2
c. Err3, indicates a failure of element #3
d. Err4, indicates a failure of elem
ent #4
e. Err5, indicates a failure of the inlet thermistor
f. Err6, indicates a failure of the outlet thermistor
g. Err7, indicates a failure of the display unit to communicate with the main board
h. LEA H2O, indicates that water has been detected in the case
Remote Display
An optional remote display may be supplied and connected to the TK2000 control board as
shown below.
Priority and Remote Controls:
Optionally, the tankless water heater may be connected to another electrical device (10A
@240VAC max.) that will give priority to the water heater over that device to ensure that both
do not operate at the same time and/or the tankless water heater may be wired to a remote
switch, relay, or provided with a 24VDC signal (such as from a building maintenance system)
to allow the tankless water heater to be remotely controlled. The diagram and description
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