I.C.E. HTDM Food Process Unit - Manual (Page 19)

19
IV. ERROR SIGNALS
1) High Limit Error
This condition will occur when the ICECON2 controller has a duct
temperature greater than the factory set point or the discharge
sensor contacts are in the open condition. This condition is
indicated by the illumination of LED numbers 5 and 8. The unit
will indicate the high limit error and will lock until reset.
Led numbers 5 and 8 will illuminate. The main supply blower will
remain energized until the duct temperature falls below the
factory set safe shut down temperature. The combustion blower
will remain at max RPM until the unit is reset.
2) Low Limit Error
The low limit lock out condition occurs when the air temperature
in the duct work has fallen below a factory set position. This
condition is indicated by the illumination of LED numbers 5, 6 and
7. Upon a drop in duct air temperature the unit will lock out and
shut down the burner. The main supply fan will be de-energized to
stop the flow of unheated air form entering the space. The
combustion blower will run at the max RPM setting.
3) Air Proving Error
Air proving error occurs when the tachometer stops sending a
signal to the ICECON2 controller. This condition is indicated by
the illumination of LED numbers 5 and 6. The fan operation must
be checked as well as the function of the tachometer sensor
itself. Improper operation will cause poor and irregular
combustion. The unit must be reset to reinitiate.
4) Flame Error
Flame error occurs when the flame signal is lost to the ICECON2
controller. Lock occurs after the fourth attempt during trial for
ignition and in any instance in which flame is lost after heat
mode has been achieved. The unit must be reset to reinitiate.
5) Valve Error
Valve error occurs when the ICECON2 controller looses
communication with the modulating gas valve or abnormal operation
of the modulating gas valve has been detected. This condition is