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3. Configure the beginning of the occupied time period for
Period 1 (OCC). Scroll down to OCC and press ENTER
to go into Edit mode. The first two digits of the 00.00 will
start flashing. Use the UP or DOWN key to display the
correct value for hours, in 24-hour (military) time. Press
ENTER and hour value is saved and the minutes digits
will start flashing. Use the same procedure to display and
save the desired minutes value. Press ESCAPE.
4. Configure the unoccupied time for period 1 (UNC).
Scroll down to UNC and press ENTER to go into Edit
mode. The first two digits of the 00.00 will start flashing.
Use the UP or DOWN key to display the correct value for
hours, in 24-hour (military) time. Press ENTER and hour
value is saved and the minutes digits will start flashing.
Use the same procedure to display and save the desired
minutes value. Press ESCAPE.
5. Scroll to DAYS and press ENTER. Scroll down to the
MON point. This point indicates if schedule 1 applies to
Monday. Use the ENTER command to go into Edit
mode, and use the UP or DOWN key to change the dis-
play to YES or NO. Scroll down through the rest of the
days and apply schedule 1 where desired. The schedule
can also be applied to a holiday. Press ESCAPE.
6. The first schedule is now complete. If a second schedule
is needed, such as for weekends or holidays, scroll down
and repeat the entire procedure for period 2 (PER.2). If
additional schedules are needed, repeat the process for as
many as are needed. Eight schedules are provided.
SERVICE TEST
The units are equipped with a Service Test fea-
General —
ture, which is intended to allow a service person to force the
unit into different modes of operation to test them. To use this
feature, enter the Service Test category on the local display and
place the unit into the test mode by changing Service
Test
TEST from OFF to ON. The display will prompt for the
password before allowing any change. The default password is
1111. Once the unit enters the Service Test mode, the unit will
shut down all current modes.
TEST — The TEST command turns the unit off (hard stop)
and allows the unit to be put in a manual control mode.
STOP — The STOP command completely disables the unit
(all outputs turn off immediately). Once in this mode, nothing
can override the unit to turn it on. The controller will ignore all
inputs and commands.
S.STP — Setting Soft Stop to YES turns the unit off in an
orderly way, honoring any time guards currently in effect.
FAN.F — By turning the FAN FORCE on, the supply fan is
turned on and will operate as it normally would, controlling
duct static pressure on VAV applications or just energizing the
fan on CV applications. To remove the force, press ENTER
and then press the UP and DOWN arrows simultaneously.
F.4.CH — The 4-Inch Filter Change Mode variable is used to
service the unit when 4-in. filters are used. When the filters
need to be changed, set Service Test
will be placed in Service Test mode and the economizer will
move to the 40% open position to facilitate removal of the 4-in.
filters. After the filters have been changed, set Service
Test
F.4.CH = NO to return the unit to normal operation.
The remaining categories: INDP, FANS, COOL, and
HEAT are sub-modes with separate items and functions. See
Table 30.
Service Test Mode Logic —
Test mode is sub-mode specific except for the Independent sub-
mode. Leaving the sub-mode while a test is being performed
and attempting to start a different test in the new sub-mode will
cause the previous test to terminate. When this happens, the
F.4.CH = YES. The unit
Operation in the Service
new request will be delayed for 5 seconds. For example, if com-
pressors were turned on under the COOL sub-mode, any at-
tempt to turn on heating stages within the HEAT sub-mode
would immediately turn off the compressors and, 5 seconds lat-
er, the controller would honor the requested heat stages.
However, it is important to note that the user can leave a
Service Test mode to view any of the local display modes and
the control will remain in the Service Test mode.
Independent Outputs —
can be turned on and off regardless of the other category states.
For example, the alarm relay can be forced on in the INDP
sub-mode and will remain on if compressor relays are request-
ed in the COOL sub-mode.
Fans in Service Test Mode —
FANS sub-mode, the user will be able to turn the supply fan on
and off, set the supply fan VFD speed, and turn the condenser
fans on, off or adjust the speed for the optional low ambient
Motormaster control.
Cooling in Service Test Mode —
mode offers different cooling service tests.
The user has manual relay control of individual compres-
sors. If the cooling stage pattern request is set to zero, the user
will have the ability to manually control compressors. If the
user energizes mechanical cooling, the supply fan and the out-
door fans will be started automatically. During mechanical
cooling, the unit will protect itself. Compressor diagnostics are
active, monitoring for high discharge pressure, low suction
pressure, etc. The user can also turn the minimum load valve
on and off or set the digital scroll capacity (on units equipped
with this device).
NOTE: It is crucial that proper compressor rotation be verified
during the service test. Each compressor must be tested
individually. After starting each compressor, the control will
check the suction pressure after 5 seconds of run time. If the
control does not see a sufficient decrease in suction pressure
after 5 seconds, mechanical cooling will be shut down, and an
alarm will be generated (A140). This alarm requires a manual
reset. If this alarm occurs, do not attempt a restart of the
compressor and do not attempt to start any other compressors
until the wiring to the unit has been corrected.
Heating in Service Test Mode —
mostat connected (C.TYP = 3 or 4), install the RED jumper
wires between TB4, terminals R (1), W2 (3) and W1 (4). Ter-
minal block TB4 is located in the unit control box. Remember
to disconnect these jumpers when Test Mode is completed. The
Heat Test Mode sub-mode will offer automatic fan start-up if
the unit is not a gas heat unit. On gas heat units, the IGC feed-
back from the gas control units will bring the fan on as
required.
Within this sub-mode, the user has control of heat relays 1
to 6. The user can also turn on the requested heat stage.
NOTE: When service test has been completed, if unit has a
thermostat connected (C.TYP = 3 or 4), remove the RED
jumper wires at TB4, terminals R (1), W2 (3) and W1 (4).
Terminal block TB4 is located in the unit control box. Store
these jumpers in the unit control box for future use.
®
Humidi-Mizer
System —
(HMZR) sub-menu, it will be possible to control and calibrate
the Humidi-MiZer modulating valves (gas bypass and con-
denser) while the unit's compressors are OFF. Calibration is a
mode in which the unit software will first over-drive each
valve in the closing direction. This is to ensure that the valve is
completely shut and to establish the "zero" open position. The
controller then keeps track of the valve's position for normal
operation. During this calibration phase, a light ratcheting
sound may be heard and will serve as proof of valve operation
and closure. Note that the calibration feature in Service Test is
23
The INDP sub-mode items
Upon entering the
The COOL sub-
If unit has a ther-
In
the
Humidi-MiZer
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