HTP HPW-50-6 - Manual (Page 22)

22
LP-374 REV. 3.25.14
PART 7 – MAINTENANCE CHECKLIST AND ERROR CODES
Before calling for service, follow the troubleshooting tips below. You may not have to call for service.
PROBLEM POSSIBLE CAUSES WHAT TO DO
Water
heater is
Noisy
Fans are used to move air through the
system. Fan noise volume will vary as water
is heated.
Some amount of fan noise is normal (similar to the blower on a central
heating or cooling system). If you hear an abnormal noise, like a
knocking sound, or the noise level seems unusually loud, contact
service.
If noise level has been increasing over the last weeks or months, the
filter may be dirty, thus making the fans work harder. Clean the filter.
Water
heater is
making
the room
too cold
Room is not vented properly or is too small
If the room is sm aller than 10’ x 10’ x 7’, the installation must have a
louvered door or other means to allow air exchange with surrounding
rooms.
Water
dripping
down the
outside of
the water
heater
Condensate drain hoses are not connected
Two drain hoses are included with your water heater. Connect the longer
6’ hose to the lower condensate drain port. Connect the short 3” hose to
the upper condensate drain port.
Condensate drain hoses are kinked or
clogged
Remove each drain hose and clear any debris from the line. You can
use a wire hanger or small screwdriver to clear out any debris in the
drain port on the unit.
Inlet/Outlet water connections are not
tightened
Tighten the inlet and outlet pipe connections.
NOTE: DO NOT OVER-TIGHTEN.
Not
enough or
no hot
water
Water usage may have exceeded the
capacity of the water heater
Wait for the water heater to recover after abnormal demand.
Fuse is blown or circuit breaker tripped Replace fuse or reset circuit breaker.
Electric supply may be off
Make sure electric supply to water heater and disconnect switch, if used,
are in the ON position.
Water temperature may be set too low. See Setting the Water Temperature, Part 3 C.
Leaking or open hot water faucets. Make sure all faucets are closed.
Electric service to your home may be
interrupted.
Contact the local electric utility.
Improper wiring Do not attempt to repair wiring. Call for service.
Manual reset limit (TCO)
A tripped TCO could mean there is a serious issue with the water heater.
Call for service.
Cold water inlet temperature may be colder
during winter months.
This is normal. Colder inlet water takes longer to heat.
Water is
too hot
Water temperature is set too high See Setting the Water Temperature, Part 3 C.
For your safety, DO NOT attempt repair of electrical wiring, controls, heating elements, or safety devices. Refer repairs
to qualified service personnel.
Electronic control has failed Call for service.
Rumbling
Noise
Water conditions in your home caused a
buildup of scale or mineral deposits on the
heating elements
Call for service.
Relief
valve
producing
popping
noise or
draining
Pressure buildup caused by thermal
expansion to a closed system
This unacceptable condition must be corrected. Contact the water
supplier or plumbing contractor for service. Do not plug the relief valve
outlet.
An alarm
sounds
and the
screen
states
“The Filter
Needs
Cleaning”.
The filter requires cleaning. A clean filter is
necessary for effective operation
Follow the instructions on how to remove and clean the filter, Part 4 D.
Table 7 – Troubleshooting Table