Carrier VECTOR 1800 MT, Руководство по эксплуатации и обслуживанию

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62-11039 4-2
4.1.1 Variable Glow Time
The glow time for the first start attempt will vary in
duration based on engine coolant temperature and
how the microprocessor is configured: TV/Short or
DI/Long as follows:
Table 4-1. Glow Time
Engine Coolant Temp
Glow Time in
Seconds
Engine Coolant Temp
SHORT LONG
Less than 32
_
F (0
_
C) 15 55
33
_
F to 50
_
F (1
_
C to
10
_
C)
10 40
51
_
F to 77
_
F (11
_
C to
25
_
C)
5 25
Greater than 78
_
F
(26
_
C)
0 10
The second start attempt has 5 seconds of glow time
added to the time shown in the table. The third start
attempt will have 10 seconds added. If the coolant
temperature sensor is defective the microprocessor
assumes a temperature of less than 32
_
F (0
_
C) for the
glow timing.
4.1.2 Engine Running
The engine is considered to be running when:
1.Engine RPM are greater than 1000, and
2. For ambient temperatures at or above
32
°
F (0
°
C), oil pressure is ok. For ambient
temperature below 32
°
F (0
°
C), oil pres-
sure is ok and DC current is more
than 2 amps.
4.2 START--STOP OPERATION
Start--Stop is provided to permit
starting/stopping/restarting of the engine–driven
compressor as required. This feature allows full
automatic control of the engine starting and stopping by
monitoring box temperature, battery charging amps and
engine coolant temperature. The main function of
automatic engine cycling is to turn off the refrigeration
system near setpoint to provide a fuel efficient
temperature control system and to initiate a restart
sequence after certain conditions are met. The
Start--Stop/Continuous key is pressed to select
between Continuous Run and Start--Stop operating
modes.
NOTE
The microprocessor may be locked so that the
unit will always operate in Start--Stop whenever
the setpoint is within a specific range. Refer to
Range Lock (Section 4.5) and ProductShield
(Section 4.6) for additional information.
4.2.1 Whenever the unit starts in Start--Stop Mode, it
will continue to run until all four of the following criteria
have been satisfied:
1) It has run for the pre--determined Minimum
Run Time. The Minimum Run Time is selected in the
microprocessor Functional Parameter List. (Refer to
Section 3.16). The purpose of this is to force the unit to
run long enough to completely circulate the air inside the
compartment, and to ensure that the product
temperature is at setpoint. This may be set for any value
between 4 minutes and 60 minutes in 1 minute intervals.
The engine must run for the Minimum Run Time before
cycling off. The factory setting is 4 minutes.
After the Minimum Run Time expires, the unit may be
shut down when the compartment temperature is within
±
0.5
_
F (
±
0.3
_
C) of setpoint for setpoints in the
Perishable range or is less than +0.5
_
F (+0.3
_
C) above
setpoint for setpoints in the Frozen range.
NOTE
All enabled compartments must be within the
specified range of setpoint in order for unit to go
to an off cycle.
2) The engine coolant temperature is above
122
°
F (50
°
C). If the unit can not cycle off, it will operate
as if in Continuous Run mode. The engine coolant
temperature will override the minimum off time and
out-of-range condition to force engine restarting when
the engine coolant temperature drops below 34
_
F
(1
_
C).
3) The battery is fully charged. Provisions are
made to sense when the battery charge is correct. A
good battery is defined as having 13.4 VDC at 75
_
F
(23.9
°
C), and the charging rate is below that selected in
the Configuration List. This condition is used to allow
cycle off of the engine.
Table 4-2 Battery Voltages
Voltage Description
10 VDC
or Less
Unit will shut down except during crank-
ing.
12.2 to
13.4 VDC
If the unit has cycled off in Start--Stop
mode and battery voltage drops below
voltage selected in the configurations
(See Section 5.2.1) , the unit is
automatically started to charge battery.
Unit will operate until the battery voltage
is high enough to allow unit to cycle off,
provided that all other conditions
required for an off cycle are met. When
battery voltage is above minimum
limits, “O.K.” will appear in the
MessageCenter right after the voltage
in the Unit Data list.
17 VDC
or more
Unit will shut down.
4) The box temperature is at setpoint.