Carrier 69NT40-561-300, Operation And Service Manual

Page: 70 / 174

T-365 4–36
Cd58 Water Pressure Switch / Con-
denser Fan Switch State or
Override Logic State Cd58 will display “CLOSE” if the WPS or CFS switch contacts are
closed or if these options are not installed. “OPEn” is displayed when
the WPS or CFS switch contacts are open. When the WPS/CFS
Override Logic is “TRUE”, the right display will flash on all units.
NOTE:
1. This CLOSE/OPEn state displayed in this Code Select function
only applies to units that have the ability to detect the state of a
WPS/CFS. This function should not be relied upon to display
the condition of the switch on units that don’t have a WPS/CFS
switch connected to ECG2 exclusively.
2. The right display will flash if the WPS/CFS Override Logic is
TRUE on all units. This is always the case, whether the unit
has a WPS or CFS installed or not.
3. The ability of the WPS/CFS Override Logic to control the con-
denser fan is limited. It is not possible for this logic to control
the fan on units that have the WPS or CFS wired in series with
the fan contactor. Units wired in this configuration can indicate
that the WPS/CFS Override Logic is active by flashing the right
display, however, the wiring will not allow for control of the con-
denser fan.
Configurable Functions - Cd59 through Cd61 are user-selectable functions. The operator can change the value
of these functions to meet the operational needs of the container.
Cd59 Pump Down Logic Cd59 allows operation of the pump down logic control. The display
will flash between “STArT PdN” and “PrESS EnTEr”.
Upon entering Cd59 the operator will be required to acknowledge that
they want to initiate the pump down control. The display will flash
between “STArT P dN” and “PrESS EnTEr”. Once the decision to
continue is confirmed pump down logic will begin, and will take com-
plete control of the unit until pump down either succeeds or fails. This
operation can not be halted once it begins without power cycling the
unit.
After pump down logic has been initiated, the operator will be notified
to close the Liquid Line Valve, the display will flash between “CLOSE
LLV” and “PrESS EnTEr”. Once complete the display will read “P dN”
to the left, and the current suction pressure to the right.
If the automatic pump down logic succeeds within 20 minutes, the unit
will turn itself off, and the display will notify the operator that pump
down is complete by flashing between “P dN DOnE” and “SHUT
OFF”. The operator must then shut off the unit.
If the automatic pump down logic does not complete within 20 min-
utes, the unit will drop out of Cd59 and return to its previous control
condition.
Cd60 Evaporator Fan Pulsing Tem-
perature Setting Cd60 contains a selectable temperature range used to determine the
engagement point of the Evaporator Fan Pulsing logic. Default setting
is -18.1°C. The user may change the temperature by pressing enter,
then scrolling to the desired temperature using either arrow key.
Press Enter to accept the change. The temperature setting will be
retained until either a Pretrip or Trip Start is initiated at which time the
temperature will set to the default setting.
Table 4–3 Controller Function Codes (Continued)
CODE # TITLE DESCRIPTION