The Lcd Touch Screen Does Not Lightup; Auxiliary Override - CADDY PF01015 Installation And Operating Instructions Manual

19.2.5. THE LCD TOUCH SCREEN DOES NOT LIGHTUP.

•
There is no electrical current going to the furnace. Check if the furnace is connected and if there is current in
the wall outlet. Check if the fuse is blown. Replace it if necessary.
•
TELCO wire is defective or not connected properly.
•
The temperature of the screen is below zero. When the screen is exposed to temperatures too cold, the liquid
crystals may not function properly which causes a loss of communication. This situation may occur in cases where
the unit has arrived from outside by a carrier or is subjected to a room temperature too low as in an unheated
cottage or a very cold garage.

19.2.6. AUXILIARY OVERRIDE

This message appears when a heat signal from the existing furnace's thermostat is sent and the Caddy shuts itself
down.
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