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7.2 Display codes
The table below details the display codes for ems controllers.
DISPLAY STATE DESCRIPTION
Ready Mode
ems controllers display the appliance sensor temperature, such as 4.0,
or the word USE
Also, the cooler lights are switched on.
See “how tocheck that ems controllers are working correctly”
Saving Mode
ems controllers keep products at the saving mode temperature unless
the savingt emperature is disabled.
The saving temperature LED shows whether the saving mode
temperature is disabled.
The cooler lights are off unless the lightdelay (Ld) parameter keeps
the lights on for a short period after the ems controller switches to the
saving mode.
The marketing mode (Ar) keeps the lights on for the durationof the
saving mode.
Defrost Mode
ems controllers switch off the compressor and switchonthe fan, if
applicable. The compressor LED should be off and the evaporator fan
LED should be on.
Door Open ems controllers display d0 to show thatthe cooler door is open.
Door Open
Alarm
ems controllers sound an alarm buzzer if cooler door remains open
for alarm delay (Ad) duration. If the cooler door is still open after the
time defined by the buzzer duration (b1) parameter, the ems controller
switches off the compressor.
Freeze-up
Protection
ems controllers disable the compressor to prevent over cooling and run
the evaporator fan, if applicable, according to the evaporator fan cycle.
Problems may occur if the ambient temperature falls below 0°C(32°F)
or if the appliance sensor fails. See “how to trouble shootp roblems with
freeze-up protection (888)”
Refrigeration
System Failure
See “how to trouble shoot refrigeration system failure (rSF) alarms”
Condenser High
Temperature
Not applicable toCO2 (R744) coolers.
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