Part 13 - Maintenance Procedures - Westinghouse WGRT 150 Series Installation Start-Up Maintenance Parts

Nothing appears on
the display control
Control is not
panel and no other
receiving 120V
water heater
components are
operating
Occurs when
Nothing appears on
communications
the display control
is lost from the
panel, but the water
control to the
heater is operating
Display repeatedly Occurs when
goes through control does not
initialization receive signal
sequence
Table 36 –Diagnostics and Suggested Corrective Actions
PART 13 – MAINTENANCE PROCEDURES
The water heater must be inspected and serviced annually, preferably at the start of the heating season, by a qualified service
technician. In addition, the maintenance and care of the water heater as outlined in this manual must be performed by the user/owner to
assure maximum efficiency and reliability. Follow the maintenance procedures given throughout this manual. Failure to perform the
service and maintenance or follow the directions in this manual could damage the water heater or system components, resulting in
substantial property damage, severe personal injury, or death.
Check the Surrounding Area
To prevent the potential of substantial property damage, severe personal injury, or death, eliminate all the materials listed in Table 10
from the area surrounding the water heater and the vicinity of the combustion air intake. If contaminants are found:

Remove products immediately from area.

If contaminants have been there for an extended period, call a qualified service technician to inspect the water heater for
possible damage from acid corrosion.
If products cannot be removed, immediately call a qualified service technician to re-pipe the combustion air intake piping away from the
contaminated areas.
Combustible/Flammable Materials
Do not store combustible materials, gasoline, or other flammable vapors or liquids near the water heater. If found, remove these
materials immediately.
Air Contaminants
If allowed to contaminate combustion air, products containing chlorine or fluorine will produce acidic condensate that will cause
significant damage to the water heater. Read the list of potential contaminants and areas likely to have these contaminants in Table 10.
If any of these contaminants are in the room where the water heater is located, or combustion air is taken from one of the areas listed,
the contaminants must be removed immediately or the intake pipe must be relocated to another area.
Ensure the Water Heater Cabinet is Closed
Ensure the water heater cabinet is closed. Tighten the two upper and lower screws to secure it. The cabinet must be closed while the
water heater is running.
Check the Power Source
Make sure the power cord is properly connected. The main power line is connected to the manual switch box inside the water heater.
Ensure service switch and/or circuit breaker
to water heater is turned ON
Is there 120V at the service switch
Is the ON/OFF switch inside the water
heater cabinet is turned on
Check for 120V at the line voltage terminal
power
block located inside the water heater cabinet
Inspect the fuse. Replace as necessary
Check for loose connections and proper pin
alignment / engagement on the control's
Cycle power off and on using water heater
display power switch and check for operation
Cycle power off and on using appliance
power switch and check for operation
from fan
plug
Turn on service switch or circuit breaker to
power water heater
Troubleshoot and correct the power supply
to the manual switch
Turn ON the manual power switch inside
the water heater cabinet
Correct wiring inside the water heater
cabinet using the wiring diagram in the
installation manual
Replace the fuse with the proper part found
in the replacement part section of this
manual. If fuse blows again, recheck the
wiring per diagram
Check for continuity on the wire harness
from the display to the control. See repair
parts section for proper replacement part.
Replace with new display module. See
repair parts section for proper replacement
part.
Replace fan.
WHL-004 REV. 5.26.17
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