Part 4 - Troubleshooting - Westinghouse WGRGH 150 Series User's Information Manual

PART 4 – TROUBLESHOOTING
To save time and money, review the following initial diagnostic steps before calling for service.
Problem
Burner Does Not Ignite
Water is Not Hot Enough
Water is Too Hot
Hot Water Temperature Fluctuates
at Tap
The Blower Continues to Operate
After Combustion Stops
Cannot Change the DHW Mode
Setpoint above 120
The Water Heater Makes Abnormal
Sounds During Operation
Table 2 – Troubleshooting Chart
This water heater is equipped with a blocked vent shutoff system. If Error Codes Er:29, Er:41, or Er:94 occur, turn off the gas valve at
the manual shutoff. Check the vent terminations for obstructions. If no obstructions are found, reset the water heater by pressing the
power button. If the error continues to occur, call a qualified service technician or the gas supplier to check the water heater. Failure to
follow these instructions could result in property damage, personal injury, or death.
If the display on the Control Panel is blank, make sure the power cord is plugged in and 3A
Make sure that the water heater is supplied with water. The unit activates when inlet water flow
Ensure the filter in the cold water supply line is not clogged with debris
Check that supply and manifold gas pressures are in accordance with specifications
Ensure the water flow sensor with three wires is properly connected on the top of the heat
Ensure the filter in the cold water supply line is not clogged with debris
Ensure the filter in the cold water supply line is not clogged with debris
This is normal. The blower operates for one minute after combustion has stopped to vent the
This is a safety device to prevent scalding. Hot water temperature over 125
o
F
There is a leak of combustion gas between the sealed chamber and exhaust tube inside the
Ensure the venting installation complies with the installation manual.
Ensure supply gas pressure is sufficient. Insufficient gas pressure will cause unstable burner
Possible Solution
Make sure that the ON/OFF button on the Control Panel is ON
fuses on the main controller in the water heater are good
sensor detects flow over 0.5 gpm
Make sure the cold and hot water lines are not plumbed in reverse
Ensure the cold water and gas supply lines are open
Make sure the water lines are not frozen.
Ensure the temperature setting on the water heater is not too low
Make sure the water heater is connected to the correct gas supply
Ensure the temperature setting is not too hot
Make sure the water heater is connected to the correct gas supply
Make sure the water heater is connected to the correct gas supply
Ensure the supply gas pressure is sufficient
remaining exhaust gas from the flue.
severe burns or death.
flame and noise.
exchanger
unit.
10
o
F can cause instant
WHL-591 Rev. 12.19.16