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"Series Two" water heaters are comprised of two individual heating modules. For the purpose of
troubleshooting, each of these two modules will be considered as a separate unit. Neither having
any effect on the performance of the other. These modules fall in to one of two categories :
1) Thermostatically controlled modules
Model Types / Order Ref Number:
Look at the order ref. number on the label located on the front cover of the unit. In the top
left hand box find the "Order Ref." Find the order reference number on the list below to
confirm the type of heating modules you have.
Heater Model Number
Order Ref Number: & UL Rating Label
EFT-15000-4-D-10
EFT-19000-4-D-10
EFT-16000-5-D-10
EFT-20000-5-D-10
For "Thermostatic" modules only
If the indicator light on the circuit board flashes one time very quickly when
the water is switched on then:
1) Turn "OFF" the power to this unit and all other units that may feed hot water to this unit,
including the right hand side module and any other preheating units.
2) Be sure that this module is fed with cold water only during this test . This unit must not be fed
with pre-heated water when performing this test.
3) There are six thin leads connected to the printed circuit board. Disconnect the third wire from
the left, from the top of the PCB (As indicated below) and tape off the end with insulating tape.
4) Run water from hot water faucet for 30 seconds and then switch power "ON" to the unit once
more.
With the water flowing:
If the light illuminates steadily, contact Technical Service and request a replacement printed circuit
board (Part #EX100). If the light still does not illuminate contact Technical Service and consult
with a technician.
Warning
Turn off all power to the water heating unit.
2) Flow controlled modules. (Non-thermostatic)
Module Types and Qty.
Thermostatic
1
1
1
1
5
Flow Controlled
1
1
1
1
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