Hubbell Electric Heater Company J User Manual download pdf (Page 24)

24

Continuous

over-temperature

condition

Do

contactors pull out

at setpoint?

Correct

temperature

setpoint?

Yes

Properly set

temperature

setpoint

Yes

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?

Yes

Replace probe

No

OK?

Contact factory

Yes

No

Is there

208/240V across

terminals of J5 on the

control board as shown

in the

diagram 3?

J5

No

Replace contactor

No

Replace control

board

No

Any or all buttons

do not work, but

display is

operational.

Re-seat ribbon

cable from display

to control board

No

Replace digital

display

OK?

Replace control

board

No

OK?

Verify that the

display is properly

seated to the base

and that the

buttons click when

pressed.

No

OK?

Individual display

elements do not

work or unusual

characters are

displayed

Re-seat ribbon

cable from display

to control board. Be

sure ribon cable is

not reversed.

No

Replace digital

display

OK?

Replace control

board

No

OK?

Diagram 3

White

Red

Yellow

For 1 contactor:

check voltage across 1 & 4

For 2 contactor:

check voltage across 1 & 3 and 1 & 4

Black

Is there

zero amp draw when the

contactors drop out at

setpoint?

Yes

No

Are configuration

settings set properly,

per Section III, Para.

4?

Yes

1

2

3

4

1 2 ... 19 20 21 22 23 24 25 26 27 28 29 30 31

Comments to this Manuals

No comments