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13
PRO
3
Top Mount Packaged Refrigeration System | Outdoor
Keypads Preliminary Congurations
Once the electrical connections have been completed, simply
power-up the controller to make it operative.
Heatcraft recommends that you check the parameters listed.
Functions Available from Keypad
ON AND OFF
Switching the instrument ON: press UP for more than 3 s (when
pressing the button, the display shows ON).
Switching the instrument OFF: press UP for more than 3 s. The
display shows the message “OFF”, alternating with the temperature
measured by the set probe.
In o status, the following functions are disabled (if featured by the
model):
• compressor control / duty setting / continuous cycle;
• defrost;
• fan control;
• alarms : ‘LO’, ‘HI’, ‘IA’, ‘cht’, ‘CHT’;
• door switch (A4= 7/8 );
• buzzer (when available)
While the following are enabled:
• temperature display, alternating with the message “OFF”;
• parameter display and setting;
• alarms: “E0”, “E1”, “E2”;
• the internal timer relating to parameter ‘dI’ is updated. If ‘dI’
expires in OFF status, a defrost is performed when restarting;
• auxiliary relay management, only in the following
congurations:
• H1= = 1/2 (“E0” alarm only)
• H1= 3, A4= 6;
BUT. NO.
NORMAL OPERATION
START UP
pressing
the button
alone
pressing
with other
buttons
1
more than
3 s: switch
ON/OFF
pressed
together
with 3
activates/
deactivates
the
continuous
cycle
–
2
- 1 s:
displays/
sets the set
point
- more
than 3 s:
accesses
the
parameter
setting
menu
(enter
password
22)
- mutes the
audible
alarm
(buzzer)
–
for 1 s
RESET
current EZY
set
pressed
together
(2 and 3)
activate
parameter
reset
procedure
3
more
than 3 s:
activates/
deactivates
the defrost
pressed
together
with 1
activates/
deactivates
the
continuous
cycle
for 1 s
displays
rmware
version
Control Parameters
st set point
rd set point dierential
Alarm Parameters
Ad temperature alarm delay
AL low temperature alarm threshold/deviation
AH high temperature alarm threshold/deviation
Defrost Parameters
d0 type of defrost
dl interval between two defrosts
dt end defrost temperature
dP maximum defrost duration
3. Controllers