the fan set point (FSP) temperature. EMS controllers run the evaporator fan, even if the cooler door
is opened, and continues to run the evaporator fan until reaching the set point (SP) temperature.
For more information about the parameters used in evaporator fan management:
l See "Fan cycle off (FCF)" on page 74
l See "Fan cycle on (FCO)" on page 74
l See "Fan set point (FSP)" on page 69
l See "Set point (SPC or SPF)" on page 67
5.3 Lights management
In the saving mode, the cooler lights are usually off.
For marketing purposes, light delay (Ld) can keep the cooler lights on for a short period after the EMS
controller switches to the saving mode.
Marketing mode (Ar) can keep the lights on for the duration of the saving mode.
For more information about the parameters used in lights management:
l See "Marketing mode (Ar)" on page 78
l See "Lights delay (Ld)" on page 72
5.4 Alarms
For alarm conditions, the EMS controller displays the appropriate alarm code and, optionally, sounds
an alarm buzzer.
Buzzer enable (b0) defines whether to sound a warning buzzer for alarm conditions.
Buzzer duration (b1) defines the duration of the buzzer for alarm conditions.
Note:
l
For door open alarms, the buzzer sounds regardless of the buzzer enable (b0) setting.
For more information about the parameters used in alarms:
l See "Buzzer enable (b0)" on page 75
l See "Buzzer duration (b1)" on page 76
5.5 Compressor management
EMS controllers manage the compressor to maintain the product temperature between the set point
(SP) temperature and the set point (SP) plus differential (dIF) temperature in the ready modeor
between the saving set point (SSP) temperature and the saving set point (SS P) plus the saving dif-
ferential (Sd) temperature in the saving mode.
To ensure that the pressures within the refrigeration system have time to equalize during com-
pressor off-cycles, the compressor rest time (rt) defines the minimum time that the compressor can
be switched off.
Compressor manufacturers usually recommend a minimum compressor rest time.
The compressor rest time (rt) helps to avoid the following:
34 of 86
27 February 2014
To Next Page
Loading...
Need help?
General
