Carrier VECTOR 6500, Руководство по эксплуатации и обслуживанию

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ProductShield High Air Examples
Example 1 If the Minimum is set to 0 ° F (-17.8 ° C) and
the Maximum is set to 90 ° F (32.2 ° C) and the ambient air
temperature falls outside these temperatures, the unit
operation can change to High Air Operation.
Example 2 If the Minimum is set to 0
° F (-17.8 ° C) and
the Maximum is set to OFF and the ambient air
temperature falls below 0 ° F (-17.8 ° C), the unit
operation can change to High Air Operation.
Example 3 If the Minimum is set to OFF and the
Maximum is set to 90
°
F (32.2
°
C) and the ambient air
temperature falls above 90 ° F (32.2 ° C), the unit
operation can change to High Air Operation.
Example 4 If both the Minimum and Maximum are set
to OFF, ProductShield High Air can not operate as there
is no range for the ambient to fall outside of.
c. ProductShield: Winter
When the unit is set for Start/Stop operation,
ProductShield Winter allows it to switch to Continuous
Operation when the ambient temperature falls below
the pre-programmed temperature. This helps protect
the unit from the possibility of cold weather issues.
Once the microprocessor detects that the ambient
temperature has dropped below the pre-programmed
temperature, the unit will switch into ProductShield
Winter which will force the unit to operate in Continuous
Operation. The unit will continue to operate in
Continuous Operation for a minimum of 30 minutes.
After 30 minutes, the unit will return to auto Start/Stop if
the ambient temperature has risen above the
pre-programmed ProductShield Winter temperature.
NOTE
All of the ProductShield settings may be viewed
in the Data List (Refer to Section 3.13). For
units with IntelliSets, the Data List will reflect the
ProductShield settings for the IntelliSet that is
currently active.
4.8. PREPROGRAMMED SOFTWARE
OVERRIDES.
4.8.1 Cargo Protect Mode.
The microprocessor will activate Cargo Protect Mode
when both the A122 “CHECK RETURN AIR SENSOR”
and A122 “CHECK SUPPLY AIR SENSOR” alarms
activate.
If the set point is in the perishable range (refer to Sec-
tion 4.3.2), the unit will shutdown.
If the set point is in the Frozen Range and the unit is in
Engine Operation, the compressor will operate fully
loaded and the engine will go to low speed.
If the set point is in the Frozen Range and the unit is in
Standby Operation, the compressor will operate un-
loaded.
The MessageCenter will display “WARNING: NO
TEMPERATURE CONTROL” when the unit is
operating in Cargo Protect Mode.
4.8.2 Compressor Minimum Operating Time
Each time the compressor is started it must operate for
a minimum of 3 minutes before it can be de-energized.
If, during the 3 minutes, the unit is operating in the
Frozen Range (refer to Section 4.3.2), it will continue to
operate in cooling. If the unit is operating in the
Perishable Range the unit will continue to cool with the
heaters energized as required to maintain setpoint.
4.8.3 Engine Speed Overrides
This section lists the different factors that determine
engine speed (high or low) in addition to the speed
controls used in temperature control.
Speed Control Overrides in priority order are:
1. Forced Low Speed.
The microprocessor will force the unit to run in low
speed when:
When the ambient temperature is less than 0 ° F
(-17.7 ° C) AND the unit is running in low speed heat
with the AC current less than 8 Amps for 10 minutes
the unit will remain in low speed until the ambient tem-
perature is above 0 ° F (-17.7 ° C) OR the AC current is
more than 8 amps for 10 minutes.
When the ambient temperature is less than 0. ° F
(-17.7 ° C) AND the unit is running in either cool, null,
or defrost AND AC current is less than 12 Amps for10
seconds, the engine will be forced to low speed. The
unit will remain in low speed until the ambient temper-
ature is above 0. ° F (-17.7 ° C) OR the AC current is
more than 10 Amps for 10 minutes.
When the ambient temperature is less than 77 ° F
(25 ° C) AND the unit is running in defrost AND the en-
gine has been running less than 30 minutes since the
Main Power switch was toggled from the OFF posi-
tion, the unit will remain in low speed until the ambient
temperature is above 77 ° F (25 ° C) OR the engine has
run for a minimum of 32 minutes since the switch was
toggled.
When the engine is forced to low speed under these
conditions, the Message Center will display “FORCED
LOW ENGINE SPEED”.
2. RAT & SAT Alarms.
When both the A122 “CHECK RETURN AIR SENSOR”
and A122 “CHECK SUPPLY AIR SENSOR” alarms
activate microprocessor control may enter Cargo
Protect Mode. Refer to Section 4.8.1.
3. High Speed To Low Speed Delay.
When the engine is operating in high speed, and the
microprocessor calls for low speed, the engine will
remain in high speed for 40 seconds OR until the actual
AC current is less than the configured Diesel or Standby
Maximum Generator Amps value less the Diesel or
Standby Offset Maximum Amps value.
4. Silent Mode.
When the Silent Mode Functional Parameter is set to
ON, the unit will operate in low speed only.
5. Engine Coolant Warm-Up.
The engine will run in low speed until the coolant is
above 79 ° F (26 ° C).