1-22
Code 01 --- Modulation Valve Opening (%)
The suction modulation valve (SMV) is a normally
open valve which restricts flow of refrigerant to the
compressor when energized by a pulse width modulated
(PWM) output. The amount of closing of the valve is
proportional to the applied current over the range of 0.2
to 1.3 A. The valve remains 100% open below 0.2 A and is
0% open at 1.3 A.
Code 02 --- Future Expansion
This code is for future expansion.
Code 03 --- Suction Solenoid Valve (Open or Closed)
Model (69NT40) will have a suction solenoid valve
(SSV) to provide maximum refrigerant flow to the
refrigeration unit. This valve will always be open for set
points at or below ---10
_
C (+14
_
F) or ---5
_
C (+23
_
F)
optionally and during temperature pulldown periods
unless suction solenoid override or current limiting
restricts its use.
Codes 04, 05 & 06 --- Line Current, Phase A, B & C
The container is supplied by three-phase electrical
power, so there are three current sensors in the unit. The
current measured is used for control and diagnostic
purposes.
For control processing, the highest of the three
current values is used for current limiting purposes.
For diagnostic processing, the current draws are used
to determine control unit operations. Whenever a heater
or a motor is turned ON or OFF, the current draw
increase/reduction for that activity is measured. The
current draw is then tested to determine if it falls within
the expected range of values for the respective unit.
Failure of this test will result in a pre-trip failure or a
control alarm indication.
Code 07 --- Mains Power Voltage
The supply voltage level is decided 8 seconds after
startup. If the value is >30 VAC, it is valid. If the read
value is above 287.5 VAC, it is considered 460 VAC level,
otherwise it is considered 230 VAC level.
When supply voltage is nominal 190/230 VAC, the
190/230 VAC current limit settings and current tables are
used. When supply voltage is nominal 380/460 VAC, the
380/460 VAC current limit settings and current tables are
used. When the sensor is invalid, the most recent valid
reading is used to determine what current limit settings
and current tables should be used. The current limit
settings and current tables will continue to be determined
in this way until the sensor becomes valid.
Code 08 --- Mains Power Frequency
The value of the main power frequency is displayed
in hertz. The frequency displayed will be halved if either
F1 or F2 is bad and AL21 is active.
Code 09 --- Ambient Temperature
The ambient sensor (AMBS) measures the tempera-
ture outside the container. For location of the sensor, see
Figure 1-3.
Code 10 --- Compressor Suction Temperature --- Optional
Measured just prior to the compressor suction
service valve, the compressor suction temperature is a
display only temperature.
Table 1-6. Controller Function Code Assignments
CODE
DATA
(Inapplicable Functions Display - - - - )
Display Only Functions
Cd01
Modulation Valve Opening (%)
Cd02
Future Expansion
Cd03
Suction Solenoid Valve (Open/Closed)
Cd04
Line Current, Phase A
Cd05
Line Current, Phase B
Cd06
Line Current, Phase C
Cd07
Mains Power Voltage
Cd08
Mains Power Frequency
Cd09
Ambient Temperature
Cd10
Compressor Suction Temperature (Optional)
Cd11
Compressor Discharge Temperature (Optional)
Cd12
Compressor Suction Pressure (Optional)
Cd13
Compressor Discharge Pressure or
Condenser Pressure (Optional)
Cd14
Future Expansion
Cd15
Future Expansion
Cd16
Compressor Motor Hour Meter
Cd17
Relative Humidity (%) (Optional)
Cd18
Software Revision #
Cd19
Battery Check
Cd20
Configuration ID
Cd21
Future Expansion
Cd22
Future Expansion
Cd23
Future Expansion
Cd24
Secondary Supply Air Temperature (Optional)
Cd25
Time Remaining Until Defrost
Cd26
Defrost Termination Sensor Temperature
Display/Select Functions
Cd27
Defrost Interval (Hours)
Cd28
Temperature Units (
_
C or
_
F)
Cd29
Failure Action (Code)
Cd30
In-Range Tolerance
Cd31
Stagger Start Offset Time (Seconds)
Cd32
Current Limit (Amperes)
Cd33
Dehumidification Control (Optional)
Cd34
Economy Mode (Optional)
Cd35
Bulb Mode Select (Optional)
Cd36
Fan speed Select (Optional)
Cd37
Defrost Termination Sensor Setting (Optional)
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