Hot Water Troubleshooting - WaterLogic WL3FW FIREWALL Manual

HOT WATER TROUBLESHOOTING INDEX
Hot Water is not Hot 87°± 5°C (189°± 15°F)
Also includes related instructions for:
Disabling Energy Star Sleep Mode
Resetting the Hot Tank Overheat or High Safety Limit
The Hot temperature set point is 87°± 5°C (189°± 15°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). It typically takes 10 minutes for the 800W heater to heat the 2 Litre of room temperature
water to the 87°C set point.
Possible Reason
Is unit in Energy Star
Sleep Mode?
No Power
Overload Tripped
Overload is a safety
feature to ensure the
tank does not
overheat.
Thermostat or
overload "open" on
Hot Tank
Heating Coil Not
Heating
Loose or improperly
connected wire(s) to
the Heating Element
/ Hot Tank.
WL3 FW Manual
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.
Check that the Green Heater & Compressor switch is on.
Turn Green Heater & Compressor Switch on.
I = ON
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.
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.
Replace components as necessary.
Turn Power off; Drain hot tank; Use multi-meter to check Heater Element for
continuity up to 60.5-70 OHM's resistance.
Hot Tank must be empty if you are checking for continuity. If open circuit is
found replace Hot Tank as necessary.
Visually inspect wire leads gong to the hot tank; confirm proper connections
to the heating elements.
Hot tank life is expected to be 3-5 years, depending on usage.
Solution
Page 57 - Revision: EU 17-09-2020