Carrier 48/50PD05 manual Third Party Control, Controls Operation, Cooling Test, Heating Test

Cooling Test

The cooling (COOL) submenu is used to change output status for testing the cooling function. The fans (FANS) and heating (HEAT) service test outputs are reset to OFF for the cooling service test. The digital scroll controller power test (CTLR) turns on and off the compressor controller. The compressor capacity test (CPAC) is used to run the compressor at a desired capacity of 15% to 100%. If a capacity is chosen between 1 and 14, the capacity will be set to 15%. The outdoor fan will turn on to high speed when the compressor capacity is 15% or greater. The indoor fan speed will default to supply fan maximum speed (FS.MX) when the compressor capacity test is first activated. The cool test fan speed (F.SPD) is used to change the fan speed while the compressor is running. All normal cooling alarms and alerts are functional.

IMPORTANT: When charging the unit, both the compressor capacity test and the cool test fan speed should be set to 100%.

Heating Test

The heating (HEAT) submenu is used to change output status for the individual heat stages, gas or electric. The fans (FANS) and cooling (COOL) service test outputs are reset to OFF for the heating service test. Indoor and outdoor fans are controlled normally to maintain proper unit operation. The indoor fan speed will run at the configured max speed FS.MX. All normal heating alarms and alerts are functional.

Table 5 — Service Test Modes and Submodes Directory

DISPLAY MENU/	EXPANDED NAME	VALUES
SUB--MENU/
NAME
SERVICE TEST
TEST	Field Service Test Mode	On/Off
INDP	Test Independent Outputs
ECON	Economizer Position Test	0 to 100%
E.CAL	Calibrate Economizer	On/Off
PE.1	Power Exhaust 1 Test	On/Off
PE.2	Power Exhaust 2 Test	On/Off
ALRM	Alarm Relay Test	On/Off
CCH	Crankcase Heat Test	On/Off
FANS SUPPLY	Test Fans
IDF	VFD Power Test	On/Off
F.SPD	Indoor Fan Speed Test	0 to 100%
OFC.1	Outdoor Fan Relay Test	On/Off
COOL	Test Cooling
CTLR	Dig Scroll Ctrl Pwr Test	On/Off
CAPC	Compressor Capacity Test	0 to 100%
F.SPD	Cool Test Fan Speed	0 to 100%
HEAT	Test Heating
HT.1	Heat Stage 1 Test	On/Off
HT.2	Heat Stage 2 Test	On/Off

THIRD PARTY CONTROL

Third party controls may interface with the unit ComfortLinkt controls through the connections described below. See other sections of these instructions for more information on the related unit control and configurations.

Remote Occupancy

The remote occupancy input is provided on the field connection terminal board (TB1). The Remote Occupancy Switch configuration, Configuration→UNIT→RM.SW, identifies the normally open or normally closed status of this input when unoccupied.

S5 = 24 VAC signal input

S6 = 24 VAC source for dry contact

Fire Shutdown

The fire shutdown input is provided for unit shutdown in response to a fire alarm or smoke detector. The Fire Shutdown Switch configuration, Configuration→UNIT→FS.SW, identifies the normally open or normally closed status of this input when there is no fire alarm.

Input at field connection terminal board (TB1)

SFire Shutdown 1 = 24 VAC source for dry contact S Fire Shutdown 2 = 24 VAC signal input

Alarm Output

The alarm output is provided on the field connection terminal board (TB1) to indicate a current alarm status. The output will be 24VAC if a current alarm exists.

SC = 24 VAC common

SX = 24 VAC signal output

Economizer Monitoring

On field terminal board (TB1), terminals 8, 9, and 10 can be used to monitor economizer position from a third party control system. See economizer operation section for additional information.

In digital mode (E.CTL = 1 or 2), the economizer commanded position can be read as a 2-10v or 4-20mA signal. TB1-8 and TB1-9 are used as follows:

STo read a 2-10v signal, disconnect the violet wire on TB1-J10-8 and place volt meter device across TB1-8 and TB1-9.

STo read a 4-20mA signal, disconnect the violet wire on TB1-J10-8 and the 500Ω resister at TB1-J10-6. Place amp meter device between TB1-8 and TB1-9.

In analog mode (E.CTL = 3), the economizer position can be read as a 2-10v feedback signal across TB1-10 and TB1-9 at any time.

IMPORTANT: The violet wire and 500Ω resister must be connected at the J10 connector as originally wired to operate the economizer in analog mode.

Economizer Damper Control

For units with the economizer option or accessory and the ECB control board, the damper position can be directly controlled through the IAQ sensor input provided on the field connection terminal board. The IAQ Analog Input configuration, Configuration→AIR.Q→IA.CF will have to set to 3 (Control Minimum Position). When IA.CF = 3, an external 4 to 20 mA source is used to move the damper 0% to 100% directly.

Terminal 2 = 4-20mA + signal Terminal 3 = 4-20mA - common

IMPORTANT: In this mode preset minimum positions configurations are not valid. The damper position may exceed the input position to provide economizer cooling and CO2 sensor input can not be used for DCV control. Refer to the Indoor Air Quality operation section for more information.

CONTROLS OPERATION

Display Configuration

The Configuration→DISP submenu is used to configure the local display settings.

Metric Display (METR)

This variable is used to change the display from English units to Metric units.

Language Selection (LANG)

This variable is used to change the language of the ComfortLink display. At this time, only English is available.

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