Fault Messages; Ac Reversed; Temp Probe Open; Temp Probe Short - State Water Heaters 120 Series Service Handbook

fault messages

displayed message/condition/indicates

AC Reversed

The Control System has detected the power supply
polarity is reversed.
AC Reversed
Fault occurred 2 mins ago
Power supply to water heater
has reversed polarity.
Call a service professional:
Your Company Name Here
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CHANGE
Important Service Reminder:
When performing any troubleshooting steps outlined in
this manual always consider the wiring and connectors
between components. Perform a close visual inspection
of all wiring and connectors to a given component before
replacement.

Temp Probe open

The Control System has detected more than 56,000 ohms
from the Temperature Sensor inside the Temperature
Probe.
Temp Probe Open
Fault occurred 2 mins ago
There is a problem with the
temperature probe.
Call a service professional:
Your Company Name Here
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CHANGE

Temp Probe Short

The Control System has detected less than 390 ohms
from the Temperature Sensor inside the Temperature
Probe.
Temp Probe Short
Fault occurred 2 mins ago
There is a problem with the
temperature probe.
Call a service professional:
Your Company Name Here
(press [DOWN] for more....)
CHANGE
58
BACK ADVANCED
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Servicing should only be performed by a Qualified Service Agent
possible causes - checK/repair
• Check the 120 VAC wall outlet (if applicable)
supplying power to the water heater for correct
polarity and ground using a AC volt meter or a plug in
tester, See Electrical Requirements on page 6.
• Check incoming power supply wiring to the water
heater in the junction box - ensure that the hot wire
is connected to the water heater's black wire and
the neutral wire is connected to the water heater's
white wire inside the junction box. See Electrical
Requirements on page 6.
• Check for 120 VAC at CCB's J3 Socket (page 41) pins
1 & 3 with J3 plug inserted, power on.
Check for AC voltage between pin 1 and ground -
should indicate 120 VAC.
Check for AC voltage between pin 3 and ground -
should indicate 0 VAC.
• Call the toll free support phone number on the back
cover of this manual for further assistance if the
problem has not been corrected after performing the
procedures outlined here.
• Check Temperature Probe plug and socket
connection at CCB's J7 Socket (page 41). Perform
close visual inspection of the pins inside the plug
and socket - ensure plugs and sockets are mating
properly and providing good contact.
• Check all wiring and plugs between the Temperature
Probe and the J7 Socket on the CCB. Repair/ replace
anything worn or damaged.
• Perform the Temperature Sensor Test on page 35.
If resistance is above 56,000 ohms, replace the
Temperature Probe.
• Call the toll free support phone number on the back
cover of this manual for further assistance if the
problem has not been corrected after performing the
procedures outlined here.
• Check all wiring and plugs between the Temperature
Probe and the J7 Socket on the CCB. Ensure no
wiring is pinched/shorted. Repair/ replace anything
worn or damaged.
• Perform Temperature Sensor Test on page 35. If
resistance is less than 390 ohms, replace the
Temperature Probe.
• Call the toll free support phone number on the back
cover of this manual for further assistance if the
problem has not been corrected after performing the
procedures outlined here.