Carrier 60 Service Manual download pdf (Page 27)

2-6

T--295

Table 2-3. Parameter Codes

CODE

CODE NAME DESCRIPTION

P1 Return Air

Temperature

This value is the temperature measured by the return air sensor. If the sensor is

shorted it will display CL. If it is open circuited it will display OP.

P2 Coil Temperature This value i s the coil temperature measured by the evaporator temperature sen-

sor. If the sensor is shorted it will display CL. If it is open circuited it will dis-

play OP.

P3 Ambient Temperature This value is the outside temperature measured by the ambient temperat ure

sensor. If the sensor is shorted it will display CL. If it is open circuited it will

display OP.

P4 Suction Line Temper-

ature

Not used.

P5 Suction Pressure This value is the suction pressure measured by the suction pressure transducer.

If the sensor is shorted it will display CL If it is open circuited it will display

OP.

P6 Discharge Pressure This value is the discharge pressure measured by the discharge pressure trans-

ducer. If the sensor is shorted it will display “CL” and if it is open circuited i t

will display “OP”.

P7 Superheat Not used.

P8 Analog Set Point

Temperature

Not used.

P9 A/C Control Window

This is the number of degrees F above setpoint at which the unloaders will be

both energized. This value can be modified between 0 and 10 degrees F. The

default value is 1 degree F.

P10 A/C Control Window

This is the number of degrees F above AC control window one at which the

first unloader will be energized. This value can be modified between 0 and 10

degrees F. The default value is 1 degree F.

P11 A/C Control Window

This is the number of degrees F above AC control window two at which the

evaporator fan speed will be set to low. This value can be modified between 0

and 10 degrees F. The default value is 1 degree F.

P12 Heat Control Window This is the number of degrees F below setpoint before the heat valve is energi-

zed. This value can be modified between 0 and 10 degrees F. The default value

is 2 degree F for heat and 4 degrees F for reheat.

P13 Compressor Safety

Off Delay

This number is the minimum time in minutes that the compressor must be off

after a high or low pressure alarm before it can be restarted. This value can be

modified between one and five minutes. The default value is 1.

P14 Fan Delay This is the minimum time (in seconds) that the fans must run at a particular

speed before changing to another speed. This value can be modified between

one and 60 seconds. The default value is two seconds.

P15 Unloader/Heat Valve

Delay

This is the minimum time (in seconds) that the unloaders and heat valve must

be in a particular state (open /closed) before changing to another state. This

value can be modified between 1 and 60 seconds. The default value is 2 sec-

onds.

P16 Compressor High

Pressure Switch

This is the current state of the compressor high pressure switch input. “CL”

will be displayed i f it is closed and “OP” will be displayed if it is open.

P17 Condenser Fan Speed

Switch

Not used.

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Carrier 60 Service Manual Page 27

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