Marvair MAR7000, Лист данных продукта

Страница: 19 / 22

MAR7000 19 1/2013, P/N 01757 Rev. B
Temperature Setpoint Is Not Maintained
• Select Occupied mode from the Home Menu—
see H/C, Fan, Occupancy, and Override on
page 7 .
• Override the fan to On from the Home
Menu—see H/C, Fan, Occupancy, and
Override on page 7 .
• Check that the appropriate application is
selected—see (Advanced) Application Options
on page 8 .
• Check that room temperature is being sensed
correctly—see Temperature Reading Is
Incorrect on page 18 .
CO
2
Level Seems Incorrect
• After power is first applied or the FlexStat is
restarted, the sensor goes through a warm-up
for approximately half a minute. During the
time the sensor count will be 0 ppm.
• Check the remote CO
2
sensor setup (if
applicable). For both internal and external
sensors, the highest of the two readings will
be used to control ventilation. The CO
2
ppm
display (if enabled) also shows the highest of
the two levels.
• To reduce nuisance complaints by occupants
of levels being “too high,” turn off the
visibility of the CO
2
level rotation in the
display. See (Advanced) User Interface (UI) on
page 14 .
MS/TP Communication Issues
• Check MAC address and device instance
numbers (especially for duplicate
numbers on the network)—see (Advanced)
Communications (BACnet) on page 10 .
• Check that EOL switches are fully latched in
the correct positions (see MS/TP EOL (End-
Of-Line) Termination on page 5 ).
• Check baud rate—see (Advanced)
Communications (BACnet) on page 10 .
• Reduce the Max Master number down to
the minimum needed for that network—see
(Advanced) Communications (BACnet) on
page 10 .
• See Wiring Issues on page 20 .
Output, Fan, and Relay Issues
Fan Does Not Run
NOTE: The animated fan icon is coupled with
BV18 in the packaged programming (not
the actual fan output terminal).
• Select Occupied mode from the Home
Menu—see H/C, Fan, Occupancy, and
Override on page 7 .
• Override the fan to On from the Home
Menu—see Home, Main Menu, and Override
Screens on page 7 .
• See Wiring Issues on page 20 .
• Check that the appropriate application
is selected—see (Advanced) Application
Options on page 8 .
• Check the fan configuration—see Fan Setup
on page 9 .
• Restart the MAR7000. After a low limit alarm
is generated, the fan will not run until after
the MAR7000 is restarted. (See Resetting the
MAR7000 on page 21
.)
Relay (Internal) Does Not Work
CAUTION
Relays are for Class-2 voltages (24 VAC) only.
Do not connect line voltage to the relays!
NOTE: Max. output current is 1 A for
individual relays @ 24 VAC/VDC or
a total of 1.5 A per bank of 3 relays
(relays 1–3 and 4–6). Do not attach a
device that draws current that exceeds
the corresponding value. Relays are NO,
SPST (Form “A”).
• Check current draw of load. Substitute an
output device that draws less current.
• Check that the output is on.
• See
Wiring Issues on page 20 .
• Restart the MAR7000. (See Resetting the
MAR7000 on page 21 .)
• If Restore Factory has just been performed, see
the Note and Cautions in Restore Factory on
page 21 .