Hubbell Electric Heater Company J User Manual download pdf (Page 23)

23

TROUBLESHOOTING FLOW CHARTS

No Hot Water

Continuous Low

Water

Temperature

Unit properly

sized?

Replace with

correctly sized unit

Is the

display on?

See 'No Display'

flowchart

Is there an

error

message?

No

Yes

No

Yes

No

Check for loose

wires and tighten

as necessary

Magnetic

contactor pull

in?

See Error

Message section

of this manual

Yes

OK?

Replace contactor

208/240V

at contactor

coil?

Verify T1000

configuration

settings. Replace

control board, if

needed

No

No

No

Yes

Yes OK?

No

Correct amps

at elements?

OK? Contact factoryNo No

Replace faulty

element

Verify water inlet

pressure and

temperature

OK?

Yes

Correct fault

condition

No

Plug probe end into RJ45 pigtail

(not supplied). Check ohms

across terminals 1 and 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

Yes

Replace probe

No

OK?

No

Diagram 1

Thermistor Resistance vs Temperature

(error ±3%)

70°F = 11883

Ω

80°F = 9299

Ω

90°F = 7334

Ω

100°F = 5828

Ω

110°F = 4664

Ω

120°F = 3758

Ω

130°F = 3048

Ω

140°F = 2488

Ω

150°F = 2043

Ω

160°F = 1687

Ω

170°F = 1400

Ω

180°F = 1169

Ω

190°F = 980

Ω

Probe End RJ45 Pigtail

Blue

Yellow

Green

Red

Black

White

1

2

3

4

5

6

Diagram 2

Verify setpoint

To verify that

there is water

in the tank

check for

continuity

between

yellow(#2) and

ground.

Verifythat all wires

are installed and in

correct positions

(see wiring

diagrams)

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