Specifications

17
ALARM DISPLAY
Any alarm will cause alarm relay to switch. All alarms have a distinct display shown on the four-digit display on the
controller. The red LED will be on for a pressure or suction temperature sensor alarm and the amber LED will on for
all other alarms. Multiple alarms can exist. There is a priority as to which alarm will be displayed before another.
ALARMS
“ALST” Description
PRIORITY
PRSA PRESSURE SENSOR ALARM 1
STSA SUCTION TEMP SENSOR ALARM 2
ATSA AIT TEMP SENSOR ALARM 3
CTSA COIL TEMP SENSOR ALARM 4
ATSA AUX TEMP SENSOR ALARM 5
LOSH LOW SUPERHEAT ALARM 6
HITA HIGH TEMPERATURE ALARM 7
LOTA LOW TEMPERATURE ALARM 7
LPRA LOW PRESSURE ALARM 7
XTA1 EXTERMAL ALARM/ DIGITAL INPUT 1 8
XTA2 EXTERMAL ALARM/ DIGITAL INPUT 2 8
XTA3 EXTERMAL ALARM/ DIGITAL INPUT 3 8
DROA DOOR OPEN ALARM 9
COMA COMMUNICATION ALARM 10
Setting Parameters By On-Board Pushbuttons
There are two levels for programming the controllers with the four-digit display and six pushbuttons. The first
level (User’s Level) will enable the USER to set the room temperature set point ‘RMSP’; the second level
(Technician’s Level) allows access to the other parameters as described above.
User’s Level Press the right or left button until ‘STPT’ (Set point) is displayed. Press the ‘ENTER’ button.
If ‘PSWD’ (Password) is displayed, press the ‘ENTER’ button again. The display should
read ‘0000’ with the 0 on the right blinking. Enter the password ‘0001’ by using the up and
down buttons to increment or decrement the blinking digit, and the right or left buttons to
move the blinking digit to the next digit. When the display reads ‘1111’, press and hold the
‘ENTER’ button (about 3 seconds) until ‘RMSP’ (room set point’ is displayed. Press the
‘ENTER’ button to display the value for ‘RMSP’. If you want to change the value, press and
hold the ‘ENTER’ button until the right digit starts blinking (about 3 seconds). Use the up
and down buttons to increment or decrement the value. Use the right and left buttons to
change the digit that is blinking. When the value that is wanted is displayed, press and hold
the ‘ENTER’ button until the digit stops blinking (about 3 seconds). At any time, pressing
the ‘BACK’ button will escape to the step before.
TECHNICIAN’s Level Press the right or left button until ‘STPT’ (Set point) is displayed. Press the ‘ENTER’ button.
If ‘PSWD’ (Password) is displayed, press the ‘ENTER’ button again. The display should
read ‘0000’ with the 0 on the right blinking. Enter the password ‘0002’ by using the up and
down buttons to increment or decrement the blinking digit, and the right or left buttons to
move the blinking digit to the next digit. When the display reads ‘0002’, press and hold the
‘ENTER’ button (about 3 seconds) until a set point’ is displayed. Use the up and down
buttons to get to the set point that is wanted. Press the ‘ENTER’ button to display the value
for that set point. If you want to change the value, press and hold the ‘ENTER’ button until
the right digit starts blinking (about 3 seconds). Use the up and down buttons to increment
or decrement the value. Use the right and left buttons to change the digit that is blinking.
When the value that is wanted is displayed, press and hold the ‘ENTER’ button until the digit
stops blinking (about 3 seconds). At any time, pressing the ‘BACK’ button will escape to the
step before.