Alarms
The controller will flash an alarm message in the home
display if an alarm condition is detected.
2FSH:
Measured value full scale high alarm. The full
scale high alarm is for furnace protection. It cannot be
accessed from the user list.
IdHi:
Measured value deviation high alarm. The devia-
tion alarm is factory preset at 50°C. If the chamber tem-
perature rises to 50°C above the setpoint temperature,
this error condition will alert end users. The furnace will
continue to control temperature at the alarm setpoint,
which was defined as 50°C above the setpoint. End
users must power off the furnace and contact Customer
Service for troubleshooting assistance. Do not reset this
alarm below 20°C at any time.
S.br:
Sensor Break: check that sensor is connected cor-
rectly.
L.br:
Loop Break: check that the heating circuits are
working properly.
Ld.F:
Heater Circuit Fault: indication of either an open or
short solid sate relay, a blown fuse, missing supply or
open circuit heater.
Sensor Break Protection
This controller provides sensor break protection in the
event the thermocouple opens. If an open thermocouple
condition occurs, the digital display will blink “S.br” and
the power to the heating element will be shut OFF (Cycle
light will extinguish).
Over-Temperature Protection
(OTP)
The OTP will be in effect during any alarm condition
when the temperature of the furnace has deviated
beyond the limit. The “Deviation High” alarm is the only
alarm value which can be changed. To change it, press
the SCROLL button until “IdHi” appears on the display.
S
INGLE
S
ETPOINT
M
ODEL W
/OTP
Note
The following alarm messages are fac-
tory default settings and may vary if you
have changed the configuration of your
controller:
IDHi: = 50°C
2FSH = 1225°C
13
Summary of Contents for 5300A20/F48025-TS
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