Carrier 69NT40-561-201, Operation & Service Manual

Page: 73 / 117

T-364 4 − 2
0
50
100
150
200
250
0 10 20 30 40 50 60 70 80 90 100
TBAR
1 1/2”
TBAR
2 5/8”
TBAR 3”
AIR
FLOW
(CMH) 50HZ
PERCENT OPEN
0
50
100
150
200
250
300
0 10 20 30 40 50 60 70 80 90 100
TBAR
1 1/2”
TBAR
2 5/8”
TBAR 3”
AIR
FLOW
(CMH)
60HZ
PERCENT OPEN
Figure 4 − 1 Upper Fresh Air Make Up Flow Chart
4.3.2 Vent Position Sensor
The VPS allows the user to determine the position of the
fresh air vent via Cd45. This function code is accessible
via the Code Select key.
The vent position will display for 30 seconds whenever
motion corresponding to 5 CMH (3 CFM) or greater is
detected. It will scroll in intervals of 5 CMH (3 CFM).
Scrolling to Cd45 will display the Fresh Air Vent Position.
The position of the vent will be recorded in the
DataCORDER whenever the unit is running under AC
power and any of the following:
Trip start
On every power cycle
Midnight
Manual changes greater than 5 CMH (3 CFM)
remaining in the new position for at least four minutes
NOTE
The user has four minutes to make necessary
adjustments to the vent setting. This time calcu-
lation begins on the initial movement of the
sensor. The vent can be moved to any position
within the four minutes. On completion of the
first four minutes, the vent is required to remain
stable for the next four minutes. If vent position
changes are detected during the four − minute
stability period, AL50 will be generated. This
provides the user with the ability to change the
vent setting without generating multiple events
in the DataCORDER.
4.4 CONNECT REMOTE MONITORING
RECEPTACLE
If remote monitoring is required, connect the remote
monitor plug at the unit receptacle, see Figure 2 − 5.
When the remote monitor plug is connected to the re-
mote monitoring receptacle, the following remote cir-
cuits are energized:
CIRCUIT FUNCTION
Sockets B to A Energizes remote cool light
Sockets C to A Energizes remote defrost light
Sockets D to A Energizes remote in − range light
4.5 STARTING AND STOPPING INSTRUCTIONS
WARNING
Make sure that the unit circuit breaker CB − 1
and the START − STOP switch (ST) are in the
“O” (OFF) position before connecting to
any electrical power source.
NOTE
The electronic phase detection system will
check for proper compressor rotation within the
first 30 seconds. If rotation is not correct, the
compressor will be stopped and restarted in the
opposite direction. If the compressor is produc-
ing unusually loud and continuous noise after
the first 30 seconds of operation, stop the unit
and investigate.
4.5.1 Starting the Unit
a. With power properly applied and the fresh air vent po-
sition set, place the START − STOP switch to “I” (ON),
see Figure 2 − 5.
b. The Controller Function Codes for the container ID
(Cd40), software version (Cd18) and unit model num-
ber (Cd20) will be displayed in sequence.
c. Continue with Start Up Inspection, paragraph 4.6.