LabRepCo GM-ULT-1786, Owner'S Manual

Page: 11 / 22

10
Part number 21729, Rev 4
Heat exchanger probe failure HS HX PROBE FAILURE yes yes no
Condenser probe failure COND PROBE FAILURE yes yes no
Ambient probe failure AMB PROBE FAILURE yes yes no
Sample probe failure (if installed) SAMP PROBE FAILURE yes yes no
Control Probe Unplugged CONT PROBE UNPLUGD yes yes yes
Heat Exchanger Probe Unplugged HTEX PROBE UNPLUGD yes yes yes
Condenser Probe Unplugged COND PROBE UNPLUGD yes yes yes
Ambient Probe Unplugged AMB PROBE UNPLUGD yes yes yes
Sample Probe Unplugged (if
installed)
SAMP PROBE UNPLUGD yes yes yes
Failed Battery Test FAILED BATTERY TEST yes yes no
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.