LP-454 Rev. 004 Rel. 002 Date 12.1.17
35
Part 11 - Troubleshooting
A. Error Code
An error code may occur during installation of the heater. This
condition may lead to a lock out condition of the controller, which
will need to be manually reset by pressing S4. The following
information will help the installer correct the problem before going
into a lockout condition, which will require a manual reset.
B. Heater Error
1. When an error condition occurs the controller will display an error
code on the display module.
2. These error codes and several suggested corrective actions are
included in Table 16.
3. In the case of E00, E13, and E14 error codes, if uncorrected, the
water heater will go into a fault condition as described in section C.
Lockout.
C. Lockout
1. When an fault condition occurs, the controller will illuminate the
red fault indication light and display a fault code (example: F00).
2. Note the fault code and refer to Table 17 for an explanation of the
fault code along with several suggestions for corrective actions.
3. Press S4 to clear the fault and resume operation. Be sure to observe
the operation of the unit to prevent a recurrence of the fault.
When servicing or replacing any components of this water heater be
certain that:
• The gas is o.
• All electrical power is disconnected.
In addition, when servicing or replacing components of this water
heater in direct contact with heater water:
• There is no pressure in the heater. Pull the release on the relief
valve to relieve pressure in the heater.
• Heater water is not hot.
Failure to follow these precautions could result in property damage,
serious personal injury, or death. Such damages ARE NOT covered by
water heater warranty.
DO NOT USE THIS APPLIANCE IF ANY PART HAS BEEN SUBMERGED
IN WATER. Immediately call a qualied service technician. The
appliance MUST BE replaced if it has been submerged. Attempting
to operate an appliance that has been submerged could create
numerous harmful conditions, such as a potential gas leakage
causing a re and/or explosion, or the release of mold, bacteria,
or other harmful particulates into the air. Operating a previously
submerged appliance could result in property damage, severe
personal injury, or death.
NOTE: Appliance damage due to ood or submersion is considered
an Act of God, and IS NOT covered under product warranty.
The water heater has wire function labels on all internal wiring.
Observe the position of each wire before removing it. Wiring
errors may cause improper and dangerous operation. Verify proper
operation after servicing.
926 Control Board Error Codes
Code Description Duration Corrective Action
E13
Combustion blower speed is less
than 70% of expected
60 seconds
1. Check blower wiring. Ensure all wires are plugged in and undamaged.
2. Replace the blower.
3. Replace the control board.
E14
Combustion blower speed is greater
than 130% of expected
1. Check blower wiring. Ensure all wires are plugged in and undamaged.
2. Replace the blower.
3. Replace the control board.
LEO Water level in tank is low
Until corrected
1. Ensure all air is bled from system.
2. Inspect low level switch and wiring for damage and repair if necessary.
FLU
Blocked Vent, Pressure Switch open,
Condensate Cup full, Condensate
Cup not present
1. Check the ue vent to be sure it is not blocked or damaged.
2. Check blocked vent pressure switch operation by applying a jumper. If
the switch is not functioning properly, replace it.
LOU 24 Volt low
1. Check line voltage. Must be between 100 - 128 volts.
2. If available, connect a PC and, using HTP service software, check the
24V supply display in the lower left corner of the screen. The number
displayed must be greater than 128 and should be greater than 250. Use
this as a troubleshooting guide as you follow the steps below.
3. Remove 10 pin Molex connector from customer connection board. If
the LOU code clears, the problem is with external sensor wiring. Examine
external sensor wiring for shorts to ground, repairing as necessary. If
LOU code is still present and the heater is so equipped, disconnect high
gas pressure switch, then low gas pressure switch, then UL 353 low water
cuto in this order, one at a time, to see if LOU code clears. Replace faulty
part. Check low voltage wire harness in heater for shorts to ground.
4. If LOU only occurs when burner tries to light, check gas valve for
excessive current draw.
5. If LOU is present with the low voltage harness disconnected from the
926 control board, replace the 926 control board.
Table 16 - Error Codes
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