Temp Log
High and low log display
1. Press the UP arrow to display the highest temperature the refrigerator has recorded since last reset or
power cycle.
2. Press the DOWN arrow to display the lowest temperature that the refrigerator has recorded since last
reset or power cycle.
Reset high and low log
1. Press UP or DOWN arrow until recorded temperature is displayed.
2. Press and hold SET until RST is displayed.
Alarming Functions
Set high and low alarms
1. Press and hold SET and UP arrows simultaneously until L1 is displayed. Use the UP and DOWN arrows
to navigate parameters.
2. The low temperature alarm parameter is AlL. Once the parameter is displayed, press SET to display the
low alarm temperature. The alarm temperature will flash on the display. Use the
UP and DOWN arrows
to set the alarm temperature. Press
SET to accept.
3. The high temperature alarm parameter is AlH. Once the parameter is displayed, press SET to display
the high alarm temperature. The alarm temperature will flash on the display. Use the
UP and DOWN
arrows to set the alarm temperature. Press
SET to accept.
Mute the Alarms
The mute button is used to temporarily mute the audible alarm for 10 minutes. If the alarm condition of the unit
has not changed in 10 minutes, then the alarm will sound again.
Alarm Reset
The alarm will reset after the cause of the alarm condition has been resolved.
Alarming Contacts
This unit is equipped with dry contacts that may be connected to a 3rd party monitoring system. The contacts are
located on the back of the unit. Standard Precision units utilize the Alarm 1 set (top 3). Each set of dry contacts
has a Common, a Normally Open and a Normally Closed connection point. By default, Alarm Relay 1 is set to
activate with any of the following alarms: Alarm 1 High temp, Alarm 1 Low temp, System errors or probe error.
Alarm Codes
When the unit senses an alarm, the display will flash the following codes.
Value
Description
HA1
Temperature is above the High Alarm#1 set point.
LA1
Temperature is below the low Alarm #1 set point.
HA2
Temperature is above the High Alarm #2 set point.
LA2
Temperature is below the Low Alarm #2 set point.
SFS
Suction line temperature probe fell below the suction failsafe temp of 5 F (-15 C).
DFS
Discharge line temperature probe rose above the discharge failsafe temp of 250 F (121 C).
Error Codes
Value
Description
P1-P8
Controller is not sensing the probe.
F9
Error saving new parameter values to permanent storage.
F10
Incomplete model configuration.
F21
Key shorted on user interface.
F22
Communication error with user interface.
F23
Communication error with Machine Control.
REF4P and REF5P Undercounter Refrigerators 9
REUC235
