KERR 1258 Series, Operation Manual And Parts List

14

S

INGLE

S

ETPOINT

C

ONTROLLER

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.

IdHi:

Measured value deviation high alarm.

S.br:

Sensor break: check that sensor is connected

correctly.

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 thermocou-
ple condition occurs, the digital display will blink “S.br”
and the power to the heating element will be shut OFF 

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. Press the UP or DOWN button to select the
OTP value you desire. We recommend a value of
50°C (120°F) above your working temperature to pro-
vide protection for your workload.

In addition to over-temperature protection, units con-
taining a single setpoint controller w/OTP feature a
mechanical OTP relay device which disconnects power
from the elements in an alarm condition (only in fur-
naces with OTP relay).  See models listed on front
page.

Note

The following alarm messages are
factory default settings and may
vary if you have changed the con-
figuration of your controller:

IDHi: = 50°C