WL350 Operating, Installation, and Service Manual Page 69 – Revision 8-30-2016
HOT WATER TROUBLESHOOTING INDEX
1.
Hot Water is not Hot 86°± -15°C (187°± 5°F)
Also includes related instructions for:
Disabling Energy Star Sleep Mode
Resetting the Hot Tank Overload or High Safety Limit
Hot Water is not Hot 86°± -15°C (187°± 5°F)
The Hot temperature set point is 86°± -15°C (187°± 5°F) and is controlled by a Thermostat on the side
of the tank.
There is a resettable Overload or High Limit Safety above the Thermostat on the side of the Hot Tank
that will trip to prevent damage to the unit if the Hot Tank is dry heated (turned on without water in
it).
The WL350 Water Treatment System does NOT have Extra Hot capability and the maximum hot
temperature is 87°C (189°F).
It typically takes 10 minutes for the 500W to heat the 1.6 Liter of room temperature (ambient) water
to the 187
°
F set point.
Possible Reason
Solution
Is unit in Energy Star
Sleep Mode?
If no water has been dispensed for 3 or more hours, unit goes into sleep
mode. Dispense hot water, wait 5 minutes, check temperature.
If unit still does not heat proceed to “No power to heater elements” below.
*If unit does not heat but you would like to Disable Energy Star Sleep
Mode - see instructions included further below in this Troubleshooting
Section.
No Power
Check that the Red Heater & Compressor switch is on.
Turn Red Heater & Compressor Switch on.
I = ON
Overload Tripped
Overload is a safety
feature to ensure the
tank does not
overheat.
Overload will “click” when pushed. The overload is automatically reset when
pressed.
*See Overload Reset Instructions that are included further below in this
Troubleshooting Section.
Thermostat or
overload “open” on
Hot Tank
Turn Power off. Check OHM’s resistance across terminals on each
Thermostat and Overload separately.
Good components will indicate a closed circuit or zero OHM’s on the meter.
