5.12
Controller Display Messages
Display
Description
Action Required
….
Standby mode
Normal — Indicates that the Circuit Breaker/Power Switch is ON
and the Controller Power Switch is OFF
tx.xx
Power up self-test
Normal — Appears momentarily at startup
oCx.x
Calibration offset value
Normal — Current calibration offset value; refer to section 6.1
Hxxx
Software High Limit value
Normal — Current Software High Limit value; refer to section 5.6
Axxx
Auto-Refrigeration set point value
Normal — Current Auto-Refrigeration set point; refer to section
5.10 (Appears only on Refrigerating/Heating Circulators)
E-H1
Software High Limit set point too low
Error — The value entered is below the control temperature set
point. Refer to Setting Software High Limit, section 5.6
FLt 1
Software High Limit value exceeded
Error — Set a Software High Limit value higher, then turn main
power to the unit OFF and back ON; refer to section 5.6
FLt 2
EEPROM reset
Error — Turn Circuit Breaker/Power Switch OFF, hold P3 Button,
and then turn the Circuit Breaker/Power Switch back ON
FLt 3
Safety Set temperature exceeded
Error — Check fluid level
Check fluid temperature and set point
Ensure that OTP set point is higher than fluid set point or
increase to maximum
Turn Circuit Breaker/Power Switch OFF, press Safety Set Reset
Button, and then turn the Circuit Breaker/Power Switch back ON
FLt 4
Heating Triac failure
Error — Service required
FLt 5
Probe failure
Error — Service required
FLt 6
i2c error — Communication failure to
modulation board
Error — Service required (Appears only on Refrigerating/Heating
Circulators)
Section 6 - Calibration and Maintenance
6.1.
Calibration
Calibration allows the user to match the Controller’s bath temperature display to an external
reference thermometer. Calibration is performed as follows:
Set the desired operating fluid temperature set point and allow temperature to stabilize.
Press the P2 and P3 simultaneously and release and repeat until the display reads (oCx.x). Press
P1 and hold until (Cal) is displayed. This will take about 2 seconds.
At one second intervals, the displayed value will alternate between the actual bath fluid temperature
and the current offset value, which is the difference between the factory calibration setting and the
user’s reference temperature sensor. The maximum offset is
±
0.9
°
C from factory calibration.
To change the calibration offset value, rotate the Select/Set Knob until the display matches the
reading on the reference temperature sensor. The display will continue to alternate between the
offset value and the calibrated display temperature.
Press the Select/Set Knob or the P1 Button to accept the entered value. When the new calibration is
stored and the mode is exited, (dONE) will appear on the display.
NOTE: The displayed offset value will also be accepted if there no activity for 20 seconds.
6.2
Heater
The heater should be kept clean. If deposits build up on the heater, they may be removed by
scrubbing with a non-metallic (plastic) abrasive pad. Do not use steel wool.
