OM 750
Page 7 of 32
LUI Menu Reference
The LUI menu eases troubleshooting and simplifies UVC configuration
as the most common parameters and system status values can be
accessed without the need of a Personal Computer or network interface.
The LUI menu is accessed via an unmarked, Hidden button. This
Hidden button is located behind the letter “h” in the MicroTech II logo
on the LUI face.
The LUI menu consists of two levels. The first level is the LUI Menu
Item List containing alphanumeric characters which represent each
parameter. The second level is the level where the parameters value is
viewed, and can be adjusted if the parameter is adjustable. A 5-second
inactivity timer is used to automatically back out of the menu levels
until returning to the effective setpoint display. See figure 5 for
procedure to change LUI Menu Item.
Figure 5. Changing an LUI Menu Item
Table 6. LUI Menu Item List
Two Digit
Display
LUI Menu Item List
Abr.
Description
햳
04
Default
Enter 1 to clear alarms (clears all inactive alarms, except filter alarm).
Reset Alarm Input
You must enter a 0 value after entering a 1 in order to re-enable the
RW
x
햲
alarm feature.
UVC (Heat/Cool) Mode Output
UVCM
Display current UVC mode.
RO
x
UVC State Output
UVCS
Display current UVC state.
RO
x
Discharge Air Temp Setpoint Output
DATS
Display current DA temperature setpoint.
RO
x
Discharge Air Temp Output
DAT
Display current DA temperature.
RO
x
Ventilation Cooling Low Limit Setpoint
VCLL
Adjust economizer cooling DA temperature low limit.
RW
x
54
O
F (12
O
C)
Mechanical Cooling Low Limit Setpoint
MCLL
Adjust mechanical cooling DA temperature low limit. This value can only
RW
x
45
O
F (7
O
C)
be displayed in degrees C.
Slave Type Configuration
Set slave type: 0 = Independent (slave uses own sensors),
RW
x
0
1 = Dependent (slave follows master).
Effective Occupancy Output
Display current occupancy: 0 = occupied, 1 = unoccupied, 2 = bypass,
RO
x
3 = standby.
Set occupancy: 0 = occupied, 1 = unoccupied, 2 = bypass, 3 = standby.
Occupancy Override Input
Adjusting this variable is only intended for troubleshooting, once you
RW
x
햲
are done you must cycle unit power to clear this variable and return the
UVC to normal operation.
Occupied Cooling Setpoint
OCS
Adjust occupied cooling setpoint.
RW
x
73
O
F (23
O
C)
Standby Cooling Setpoint
SCS
Adjust standby cooling setpoint.
RW
x
77
O
F (25
O
C)
Unoccupied Cooling Setpoint
UCS
Adjust unoccupied cooling setpoint.
RW
x
82
O
F (28
O
C)
Occupied Heating Setpoint
OHS
Adjust occupied heating setpoint.
RW
x
70
O
F (21
O
C)
Standby Heating Setpoint
SHS
Adjust standby heating setpoint.
RW
x
66
O
F (19
O
C)
Unoccupied Heating Setpoint
UHS
Adjust unoccupied heating setpoint.
RW
x
61
O
F (16
O
C)
Wall Sensor Type
Set wall sensor type: 0 = +/- 3
°
F, 1 = 55
°
F to 85
°
F.
RW
x
0
Outside Air Damper Position Output
OADP
Display OA damper position.
RO
x
Adjust OA damper minimum position with IAF at high speed. (this
OAD Min Position High-Speed Setpoint OADH
variable will be factory set to 5% open when the unit is ordered with
RW
x
20%
optional CO2 DCV)
OAD Min Position Med-Speed Setpoint OADM
Adjust OA damper minimum position with IAF at medium speed. (this
RW
x
30%
variable is ignored when the unit is ordered with optional CO
2
DCV)
OAD Min Position Low-Speed Setpoint
OADL
Adjust OA damper minimum position with IAF at low speed. (this
RW
x
35%
variable is ignored when the unit is ordered with optional CO
2
DCV)
Exhaust Interlock OAD Min Position
EOAD
Adjust OA damper minimum position when the exhaust interlock
RW
x
99%
Setpoint
input is energized.
Energize Exhaust Fan OAD Setpoint
OADE
Adjust OA damper position above which the exhaust fan output will
RW
x
10%
be energized.
OAD Max Position Setpoint
OAMX
Adjust OA damper maximum position.
RW
x
99%
Set OA damper lockout feature status: 0 = disable, 1 = enable.
OAD Lockout Enable
(this variable will be factory set to 1 when the unit is ordered
RW
x
0
as a recirc unit with no OAD)
Adjust OA temperature below which the OA damper will be closed
OAD Lockout Setpoint
OALS
if the OA damper lockout is enabled. (this variable will be factory set
RW
x
36
O
F (2
O
C)
to –99
O
C when the unit is ordered as a recirc unit with no OAD)
Continued on next page.
