Single-zone snow melt control installation and operation manual | 31
Error messages
Field
Description
MAXIMUM MELT TIME ERROR
— The control has operated in melting for the time
set by Maximum Melt Days setting located in the System menu. This error is usually
created when there is a mechanical system failure resulting in the snow melt slab not
heating correctly.
Clear the error message by touching the Cancel key while viewing the error
message. Use the Manual Override menu to manually check that each component of
the mechanical system is operating correctly.
If necessary, change the Maximum Melt Days setting to a longer time period or to Off.
OUTDOOR SENSOR SHORT CIRCUIT ERROR
— Due to a short circuit, the control
is unable to read the outdoor sensor. The control continues to operate and assumes
an outdoor temperature of 32ºF (0ºC). Energy saving features such as Warm
Weather Shut Down (WWSD) and Cold Weather Cut Out (CWCO) are disabled.
Check the outdoor sensor wire for short circuits according to the sensor installation
manual. It may be necessary to replace the outdoor sensor. Once the error has been
corrected, the error message automatically clears.
OUTDOOR SENSOR OPEN CIRCUIT ERROR
— Due to an open circuit, the control
is unable to read the outdoor sensor. The control continues to operate and assumes
an outdoor temperature of 32ºF (0ºC). Energy saving features such as Warm
Weather Shut Down (WWSD) and Cold Weather Cut Out (CWCO) are disabled.
Check the outdoor sensor wire for open circuits according to the sensor installation
manual. It may be necessary to replace the outdoor sensor. Once the error has been
corrected, the error message automatically clears.
SUPPLY SENSOR SHORT CIRCUIT ERROR
— Due to a short circuit, the control
is unable to read the supply sensor. When set to App Mode Boiler, the control stops
operation and does not provide any heat. When set to App Mode PWM the control
continues melting or idling.
Check the supply sensor wire for short circuits according to the sensor installation
manual. It may be necessary to replace the supply sensor. Once the error has been
corrected, the error message automatically clears.
SUPPLY SENSOR OPEN CIRCUIT ERROR
— Due to an open circuit, the control
is unable to read the supply sensor. When set to App Mode Boiler, the control stops
operation and does not provide any heat. When set to App Mode PWM the control
continues melting or idling.
Check the supply sensor wire for open circuits according to the sensor installation
manual. It may be necessary to replace the supply sensor. Once the error has been
corrected, the error message automatically clears.
SLAB SENSOR SHORT CIRCUIT ERROR
— Due to a short circuit, the control is
unable to read the Slab Sensor for Aerial Snow Sensor (A3040073). Idling is disabled
and energy saving features such as Warm Weather Shut Down (WWSD) and Cold
Weather Cut Out (CWCO) are operated using the outdoor temperature only.
Check the slab sensor wire for short circuits according to the sensor installation
manual. It may be necessary to replace the slab sensor. Once the error has been
corrected, the error message automatically clears.
