PWC – 450
PureWaterCooler
Copyright 2011 Vertex Water Products
13. Trouble Shooting Cont.
Possible causes Solution .
5. Thermal sensor failure The thermal sensors are attached to the
hot tank. The upper sensor is a ? ºC
sensor and functions as an over heat
safety. The lower sensor is a 82 ºC
sensor and controls the heating element
function. The lower sensor would be the
problem if there was no hot water. To
see if the sensor is functioning properly,
first unplug the cooler from the wall.
remove the terminal from the sensor.
Using an ohm meter, check for continuity
If there is no continuity (open), replace
sensor as per section 9.
6. Hot tank turned on without The hot power should never be turned on
water in tank without water in the tank. If this happens,
the upper thermal sensor on the hot tank
will switch, cutting power to the hot tank.
This is a safety device to prevent the heating
element from burning itself out due to dry
heating. Once the hot tank cools off the
switch will be reset automatically to
operating condition. See section 7.
No Hot Water from Hot Tank cont.
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