Hubbell Electric Heater Company J manual Continuous, Diagram

Continuous		Do
over-temperature	contactors pull out
condition	at setpoint?
					Yes
			Yes	Is there
				zero amp draw when the
				contactors drop out at
				setpoint?
		No

Correct

temperature

setpoint?

No

Properly set temperature

	Are configuration
	settings set properly,
Yes
	per Section III, Para.
	4?

Yes

Diagram 3
White	1
Black	2		Is there
Red	3
		208/240V across
Yellow	4	terminals of J5 on the
		control board as shown
	J5		in the
		diagram 3?
For 1 contactor:
check voltage across 1 & 4
For 2 contactor:			Yes
check voltage across 1 & 3 and 1 & 4

No

No Replace contactor

setpoint

Contact factory

Plug probe end into RJ45 pigtail

(not supplied). Check ohms

across terminals 1and 4

(see diagrams 1 & 2). Compare this with the ohms the thermistor

should supply for the actual

temperature in the tank

Do ohms match?

No

Replace probe

	Replace control
Yes
	board

OK?

No

Any or all buttons do not work, but display is operational.

Re-seat ribbon
cable from display		OK?
to control board
	No
Verify that the
display is properly

Individual display	Re-seat ribbon
elements do not	cable from display
work or unusual	to control board. Be	OK?
characters are	sure ribon cable is
displayed	not reversed.

No

seated to the base		OK?
and that the
buttons click when
pressed.
	No

Replace digital

display

OK?

No

Replace digital

display

Replace control

board

OK?

No

Replace control

board

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