Alarm Criteria - LabRepCo GM-ULT-1786 Owner's Manual

Heat exchanger probe failure
Condenser probe failure
Ambient probe failure
Sample probe failure (if installed)
Control Probe Unplugged
Heat Exchanger Probe Unplugged
Condenser Probe Unplugged
Ambient Probe Unplugged
Sample Probe Unplugged (if
installed)
Failed Battery Test

Alarm Criteria

HIGH TEMP ALARM – Activates when the control probe temperature is at or above the
high temp alarm level as stored in memory for more than 1 minute. (Not Cold Enough)
LOW TEMP ALARM - Activates when the control probe temperature is at or below the low
temp alarm level as stored in memory for more than 1 minute. (Too Cold)
DOOR OPEN – Activates when the door is sensed open for more than 1 minute. Note that
the door sensor is an input to the main control board and its status is to be part of the
regular communication from the main control board to the display board.
AC LINE FAILURE – Activates when the input line voltage falls below 80 VAC for 115 V
unit or 160 VAC for 230 V unit for more than 10 seconds. This alarm will override and
cancel the "LOW LINE VOLTAGE" alarm, so that both alarms are not active at the same
time.
POWER FAILURE 1 – Activates when the input line voltage falls below 80 VAC for 115 V
unit or 160 VAC for 230 V unit for more than 10 seconds. This alarm will override and
cancel the "LOW LINE VOLTAGE" alarm, so that both alarms are not active at the same
time.
POWER FAILURE 2 – Activates when the 12 VDC on the main control board falls below
11.0 VDC for more than 2 seconds and the AC line voltage does not fail.
POWER FAILURE 3 – Identical to POWER FAILURE 2, except the 12 VDC on the main
control board recovers to more than 11.0 VDC. The control logic will return to operating
the main control board on the 12 VDC power supply rather than on battery backup power.
Operating the main control board on battery backup power will eventually drain the
battery output to 10.5 V and the compressors will shut off.
Part number 21729, Rev 4
HS HX PROBE FAILURE
COND PROBE FAILURE
AMB PROBE FAILURE
SAMP PROBE FAILURE
CONT PROBE UNPLUGD
HTEX PROBE UNPLUGD
COND PROBE UNPLUGD
AMB PROBE UNPLUGD
SAMP PROBE UNPLUGD
FAILED BATTERY TEST
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