Programming Operating Schedules; Service Test; Independent Outputs; Fan Test - Carrier 50PD05 Operating And Service Instructions

Programming Operating Schedules
The ComfortLink _ controls will accommodate up to eight
different schedules (Periods 1 through 8), and each schedule is
assigned to the desired days of the week. Each schedule includes
an occupied on and off time. As an example, to set an occupied
schedule for 8 AM to 5 PM for Monday through Friday, the user
would set days Monday through Friday to ON for Period 1. Then
the user would configure the Period 1 Occupied From point to
08:00 and the Period 1 Occupied To point to 17:00. To create a
different weekend schedule, the user would use Period 2 and set
days Saturday and Sunday to ON with the desired Occupied On
and Off times.
IMPORTANT: By default, the time schedule periods are
programmed for 24 hours of occupied operation.
To create a schedule, perform the following procedure:
1. Scroll to the Configuration mode, and select CCN
CONFIGURATION (CCN). Scroll down to the Schedule
Number (Configuration--,CCN--,SCH.O=SCH_. If
password protection has been enabled, the user will be
prompted to enter the password before any new data is
accepted. SCH_ has a range of 0 to 99. The default value
is 1. A value of 0 is always occupied, and the unit will
control to its occupied set points. A value of 1 means the
unit will follow a local schedule, and a value of 65 to 99
means it will follow a CCN schedule. Schedules 2-64 are
not used as the control only supports one internal/local
schedule. If one of the 2-64 schedules is configured, then
the control will force the number back to 1. Make sure the
value is set to 1 to use a local schedule.
2. Enter the Time Clock mode. Scroll down to the LOCAL
TIME SCHEDULE (SCH.L) sub-mode, and press
ENTER. Period 1 (PER.l) will be displayed.
3. Scroll down to the MON.I 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 display 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.
4. Configure the beginning of the occupied time period for
Period 1 (OCC). Press ENTER to go into Edit mode, and
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.
5. Configure the unoccupied time for period 1 (UNC). Press
ENTER to go into Edit mode, and 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.
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. See
Table 4 for an example of setting the schedule.
SERVICE TEST
The Service Test function can be used to verify proper operation of
compressors, heating stages, indoor fan, outdoor fans, power
exhaust fans, economizer, crankcase heaters, and the alarm relay.
Use of Service Test is recommended at initial system start up and
during troubleshooting (See Table 5 for point details).
Service Test mode has the following changes from normal
operation:
• Outdoor air temperature limits for cooling circuits, economizer,
and heating are ignored. Normal compressor time guards and
other staging delays are reduced to 30 seconds or less.
• Circuit alerts are limited to 1 strike (versus 3) before changing to
alarm shut down state.
• The status of ALM.N is ignored so all alerts and alarms are
broadcast on CCN.
• The words "SERVICE TEST" are inserted into every alarm
message.
Service test can only be turned ON/OFF at the unit display. Once
turned ON, other entries may be made with the display or through
CCN. To turn Service Test on, change the value of TEST to ON.
To turn service test off, change the value of TEST to OFF.
IMPORTANT: Service Test mode may be password protected.
Refer to Basic Control Usage section for more information.
Depending on the unit model, factory-installed options, and
field-installed accessories, some of the Service Test functions may
not apply.
Independent Outputs
The independent (INDP) submenu is used to change output status
for the economizer, power exhaust stages, crankcase heaters, and
the alarm relay. These independent outputs can operate
simultaneously with other Service Test modes. All outputs return to
normal operation when Service Test is turned off. When the
economizer is using the factory default Digital Control Type
(Configuration---,ECON---,E.CTL is 1 or 2) then the Economizer
Calibration feature may be used to automatically check and reset
the economizer actuator range of motion. Refer to the economizer
operation section of more details.
IMPORTANT: If a network force is applied to CCN points:
ECONOCMD, PE_I, PE_2, or ALMOUT, their respective test
mode functions will not be usable. Those forces are at a higher
level than test mode; therefore they will still be honored when in
test mode.
Fan Test
The fans (FANS) submenu is used to change output status for the
indoor fan and outdoor fan stages. The VFD power can be turned
on and off via IDF (Supply VFD Power Test). The indoor fan
speed test (F.SPD) runs the fan at the desired speed entered. The
outdoor fan relay test (OFC.I) only tests the relay for switching
between high and low speeds. The actual outdoor fan will not run
unless cool test is on. The cooling (COOL) and heating (HEAT)
service test outputs are reset to OFF for the fans service test.
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