Installation Guide
TROUBLESHOOTING
Error Codes for Point-of-Use Models
If you have a two- or four-chamber model, see page 19.
WARNING
Electric Shock Risk
Contact with the electrical parts inside the water heater can result in severe injury or death from electrical shock:
Disconnect power by opening the circuit breaker(s) or removing the fuses before installing or servicing.
Some models are connected to more than one branch circuit, and more than one disconnect switch may be
required to de-energize the equipment. All branch circuits must be disconnected prior to service.
The LED on the circuit board will display an error code as a ash pa ern. The ash pa ern is displayed as follows:
rst digit of the error code is ashed in RED.
GREEN ash separates the rst and second digits.
ashed in RED.
See the example below. Components are iden ed in Figure 8, page 18.
Example from the Table Below:
Flash Code Sequence: 3-6 (Freeze Warning). The 3-6 code would be displayed like this:
3 6
3 red ashes
A er you iden fy the code, locate its descrip on and solu on in the table.
NOTICE:
ple codes; verify all sequences.
ple error codes, the LED will pause between each one. The GREEN LED will ash twice a er the last error
code. The error codes will then repeat.
hear the ash code, press the mode bu on for two seconds. This will turn the audible beeper on. See Figure 8,
page 18.
Flash Code
Sequence
Description Action / Solution
1-1 Disable switch open (hardware
jumper is not installed on the circuit
board).
Install the missing jumper(s) on the circuit board as shown in Figure 8, page 18.
Both jumpers must be in place.
1-2 T-In thermistor is open. Check wiring. Replace as necessary.
1-3 T-Out thermistor is open. Check wiring. Replace as necessary.
1-7 Water temperature above 145°F has
been detected. (This code will clear
when the condi on is corrected.)
1. Turn o all power to the water heater. Open a nearby hot water xture
and allow water to run through the heater for about 5 minutes. Check the
resistance of the temperature sensors (thermistors). If one of the thermistors
has a resistance that is much higher than the others, replace that thermistor.
2. If the issue persists, the circuit board (control board) may need to be replaced.
Contact Technical Support.
TROUBLESHOOTING
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