A.O. Smith dve-80 - Temp Probe Open (Fault Condition); Temp Probe Short (Fault Condition)

To Next Page

To Previous Page

TROUBLESHOOTING

Servicing should only be performed by a Qualified Service Agent

Fault & Alert Messages

DISPLAYED MESSAGE

CONDITION/INDICATES

CHECK/REPAIR

“Temp Probe Open”

(Fault Condition)

The control system has detected an open circuit in

the temperature sensor. The control system will

declare this fault condition if it senses a resistance

above 56,000 ohms from the temperature sensor.

Possible Causes:

Plug/socket connection problems

Wiring connection problems

Defective Immersion Temperature Probe

• Check the J5 plug/socket connections at the

CCB ensure they are mating properly and pro-

viding good contact. Check the pins inside the

J5 plug/socket for wear or damage. See CCB

illustration and socket identification on pages 42

- 44. Replace damaged plug connectors/wiring

harness as necessary.

• Check for pinched or broken wiring between the

Immersion Temperature Probe and the J5 plug/

socket connection on the CCB - repair or

replace damaged wiring as necessary. See

CCB illustration and socket identification on

pages 42 - 44.

• Check the resistance of the temperature sensor

inside the Immersion Temperature Probe - see

pages 37 - 39. Replace the Immersion Temper-

ature Probe if measured resistance is above

56,000 ohms.

• Call the toll free technical support phone num-

ber on the back cover of this manual for further

assistance if the problem has not been cor-

rected after performing the procedures outlined

here.

“Temp Probe Short”

(Fault Condition)

The control system has detected a shorted circuit in

the temperature sensor. The control system will

declare this fault condition if it senses a resistance

below 390 ohms from the temperature sensor.

Possible Causes:

Shorted wiring

Defective Immersion Temperature Probe

• Check for pinched or shorted wires between the

J5 plug/socket connection on the CCB and the

Immersion Temperature Probe - repair or