Greenheck Microprocessor Controller v3.0 (469690) - Manual (Page 5)

5
Access the UNIT STATUS menu through the Main Menu. Scroll through the menu screens using the
keys. Screens with a dashed line border are dependent upon an optional accessory and may not
always appear.
“STATUS LINE”
System Status
hr:min:sec
mm/dd/yyyy
T
HE
S
TATUS
L
INE DISPLAYS WHICH MODE THE UNIT IS IN
.
Possible modes include:
A. Initial Delay
J. Sys On-Dehumidifying
B. Opening Dampers K. Sys On-Dehum & Reheat
C. Exhaust Fan Starting L. Unoccupied-Unit Off
D. Supply Fan Starting M. Unoccupied-Heating
E. System On N. Unoccupied-Cooling
F. Defrost Mode Active O. Manual Override!!
G. Sys On-Economizer P. Remote Off
H. Sys On-Heating Q. Press Alarm Button!
I. Sys On-Cooling
“STATUS LINE”
Outside:
000. 0º F
Supply: 000. 0º F
Cold Coil: 000. 0º F
“STATUS LINE”
Room:
000. 0º F
“STATUS LINE”
Supply Fan:On
Exhaust Fan:On
T
HE TEMPERATURES ON THIS SCREEN DISPLAY REAL
-
TIME CONDITIONS FROM THE
SENSORS IN THE UNIT
.
After a period of inactivity (approximately 3 minutes), the controller will revert to this
screen.
T
HE TEMPERATURE ON THIS SCREEN REPRESENTS THE REAL
-
TIME CONDITIONS
BASED ON THE SENSOR IN THE ROOM
.
This screen only appears if the room supply temp reset sensor is wired into B4 and
BC4 on the controller.
T HE CONTROLLER DISPLAYS THE RETURN SIGNAL THAT IS BEING RECEIVED FROM
THE S UPPLY AND E XHAUST FANS .
On indicates the fan is running. In most modes of operation, both fans will be On. There
are three modes in which one fan may be Off while the other is On. 1) Start-up of the
unit, 2) Timed exhaust frost control, and 3) Unoccupied, 100% return air mode. Other
than these three modes, if one fan is Off and the other is On, there may be a problem.
“STATUS LINE”
Energy Recovery
Wheel: 000% Speed
“STATUS LINE”
Cooling Control:000%
Compressor: ##
E
NERGY RECOVERY WHEEL OPERATION IS DISPLAYED AS A PERCENT
.
If the unit does not contain a VFD on the wheel motor, then 0% = OFF; 100% = ON. If
the unit contains a VFD to modulate the wheel speed for frost control or economizer
operation, this screen will display the percentage directly proportional to the 0-10 VDC
signal being sent to the wheel VFD
0 VDC = 000%, 10 VDC = 100%
To override: ‘MANUAL OVERRIDE’ menu >Energy Recovery Wheel Override
T
HIS SCREEN DISPLAYS THE COOLING CONTROL AS A PERCENTAGE
.
This screen only appears if a cooling option is provided.
Chilled Water Coil: The Loop Output % is directly proportional to a 0-10 VDC signal
000% = 0 VDC - Full Closed; 100% = 10 VDC - Full Open
000% = 2 VDC - Full Closed; 100% = 10 VDC - Full Open
The cooling control valve can either be 0-10 VDC or 2-10 VDC depending upon the
valve installed. The user may need to adjust the I/O SETUP menu so that 0-100%
cooling correlates with a 2-10 VDC signal (0-10 VDC is default).
To adjust: ‘I/O SETUP’ menu> Analog Output Y3
DX Coil: Cooling Control displays compressor engagement as a percent
• 000% Compressors OFF (1 or 2 compressor system)
• 050% First compressor ON (2 compressor system)
• 100% First & second compressor ON (2 compressor system)
First compressor ON (1 compressor system)
UNIT STATUS MENU