Alarms
880 Operation Manual Issue 7 EMC INDUSTRIAL GROUP LTD Page 15 of 25
Alarms
EMC kiln controllers have proven over a number of years to be very reliable. How-
ever there are times when things do go wrong with an installation.
The controller has an inbuilt comprehensive monitoring system designed to avoid
kiln melt down.
If a fault occurs an internal audible beeper is sounded and the firing cycle will either
be paused, allowing the cycle to continue if the fault can be cleared, or the firing
cycle will be stopped. The Alarm light flashes to indicate that the controller has de-
tected a problem.
If option OP-1 relay card is fitted the ALARM contact, which can be used to sound
an external alarm device, will close until the alarm is acknowledged and the RUN
contact is opened and remains open until the firing is re started.
To acknowledge the alarm press the ALARM CANCEL key.
When the ALARM CANCEL key is pressed, the internal beeper is muted, and the
Alarm light turns on steady if the problem is still present, or turns off if the problem
has gone. While the ALARM CANCEL key is held down, the alarm number and
alarm mnemonic are shown in the display.
The Alarm List below shows, for each alarm number, what the large and small dis-
plays are showing, what state the controller is in, the likely cause of the fault and
the fault remedy.
To help short cut other problems not detected by the alarm system, a Typical
Faults List has been compiled of common faults, with separate columns for easy
identification of the Fault, the Cause and the Remedy.
Alarm List
SMALL DISPLAY Shows
point in program where
power failed (eg )
LARGE DISPLAY
Shows current kiln tempera-
ture
CONTROLLER STATE
Controller is paused (only
if Auto Continue is set to
). Heat is OFF
CAUSE Mains power failed during a firing or delayed start.
ALARM
NUMBER
Press alarm
key to view
)*
REMEDY Press RUN STOP once to continue firing, or twice to cancel firing.
SMALL DISPLAY Not af-
fected
LARGE DISPLAY
Shows (over-range)
CONTROLLER STATE
Heat is OFF
CAUSE Thermocouple burnout or thermocouple wiring break
ALARM
NUMBER
Press alarm
key to view
REMEDY Check the thermocouple and wiring by turning power off to the controller and
strap terminals 14 and 15 together with a wire link. Turn power on. If the display shows
ambient temperature, i.e. approximately 25°C, the thermocouple probe or it’s wiring is
faulty. If the display still shows the controller is faulty and should be returned to the
supplier with a written description of the fault.
SMALL DISPLAY Not af-
fected
LARGE DISPLAY
Shows (under-range)
CONTROLLER STATE
Heat is OFF
CAUSE Thermocouple reverse connected
ALARM
NUMBER
Press alarm
key to view
REMEDY Check thermocouple connections. See Thermocouple, page 21.
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