HTP 199-55SA - Manual (Page 48)

48
LP-179 REV. 3.21.14
When servicing or replacing components that are in direct contact with heater water, be certain that:

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.

The electrical power is off.
DO NOT USE THIS APPLIANCE IF ANY PART HAS BEEN SUBMERGED IN WATER. Immediately call a qualified 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 fire 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 flood 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
E131
Heater combustion air fan
speed less than 70% of
expected.
60 Sec.
1. Check the combustion air fan wiring.
2. Replace the combustion air fan.
3. Replace the control board.
E14
Heater combustion air fan
speed is more than 130% of
expected.
60 Sec.
1. Check the combustion air fan wiring.
2. Replace the combustion air fan.
3. Replace the control board.
LEO Water Level in Tank is Low Until Corrected
1. Be sure 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
Until Corrected
1. Check the flue vent to be sure it is not blocked or damaged.
2. Check the blocked vent pressure switch operation by applying a jumper.
(If the switch is not functioning properly, replace it.
LOU 24 Volt Low Until Corrected
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 LOU
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 cutoff 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 14 – Control Board Error Codes