Trebor Q-Series Di Water Heater - Manual (Page 17)

Q-SERIES DI HEATER OPERATION / MAINTENANCE MANUAL PAGE 17
LiqLeak = Status of Liquid Leak interlock inside heater
OverTemp = Status of Over-Temperature Limit interlocks. Each
heater has one temperature limit sensor on the quartz substrate and
one temperature limit sensor on each of the heating elements. An
over-temperature condition detected by any of these sensors will be
reported by the OverTemp alarm
LiqLevel = Status of Liquid Level interlock
TC Error = Status of thermocouples. This alarm is activated if any of
the ther mocouples report an “open” condition.
Alarm status will be shown in the following states:
Alarm Ok – All interlocks are clear and heater is able to operate
normally.
Alarm Delay – The pressure and liquid level interlocks wait a certain
period of time before putting the system into an alarm state. This
delay is intended to eliminate alarm activation and system shutdown
due to instantaneous fluctuations in fluid pressure and liquid level.
During this period the heater is put in a safe state while waiting for the
fault condition to clear and the alarm will be reported in the Alarm
Delay state. If fault condition is corrected before the timeout period
elapses, the heater will go back to normal operation without alarming.
If the fault condition is not corrected before the timeout period
expires, the heater will progress to an alarm state.
NOTE: The default timeout period is 30 seconds. Contact factory for
instructions on how to adjust this time delay.
Alarm Active – A fault condition has initiated an alarm state and the
fault has not yet been corrected.
Alarm On
– A fault condition has initiated an alarm state but the fault
has already been corrected.
The following navigation buttons are also available for advancing to the
Plot, Configuration and Home pages:
Button F3 ( ) switch the display to the Plot page
Button F4 ( ) switches the display to the Configuration page
Button F5 ( ) switches the display to the Home page