Service Test; Independent Outputs; Fan Test; Cooling Test - Carrier 48LC Series Controls, Start-Up, Operation And Troubleshooting

SERVICE TEST

The Service Test function can be used to verify proper operation of
compressors, heating stages,
R
Humidi- -MiZer system operation, power exhaust fans, economizer,
crankcase heaters, and the alarm relay. Use of Service Test is
recommended at initial system start up and during troubleshooting.
(See Table 4 for point details)
Service Test mode has the following changes from normal operation:
Outdoor air temperature limits for cooling circuits, economizer,
S
and heating are ignored.
Normal compressor time guards and other staging delays are
S
reduced to one minute or less.
Circuit strike out time is reduced to 1 minute instead of 15 minutes.
S
It may take up to 30 seconds to actually enter test mode after
S
activating the command.
Press the TEST button on the SystemVut interface anytime to
access the Test menu. Service Test mode can only be turned
ON/OFF at the unit display. Once turned ON, other entries may be
made with the display or through CCN. To turn Service Test mode
on, change the value of TEST MODE to ON. To turn service test
mode off, change the value of TEST MODE to OFF. Service Test
mode will be automatically turned off based on keypad inactivity
and the Service Mode Test Time out (TEST MODE TIMEOUT).
NOTE: Service Test mode may be password protected. Refer to
Basic Control Usage section for more information. Depending on
the unit model, factory- -installed options, and field- -installed
accessories, some of the Service Test functions may not apply.

Independent Outputs

The INDEPENDENTS submenu is used to change output status for
the economizer, Humidi- -MiZer system valves, power exhaust stages,
crankcase heaters, the alarm relay, as well as perform a compressor
bump test. These independent outputs can operate simultaneously with
other Service Test modes. All outputs return to normal operation when
Service Test is turned off. The compressor bump tests cannot be run
while running cooling tests and will automatically turn off after one
minute.

Fan Test

The FAN TESTS submenu is used to change speed for the indoor
fan and outdoor fans. The outdoor fan speeds can be controlled
individual or all together with the ALL ODF SPD TEST. The
outdoor fan and indoor fan transition type points inform the test
routine how to handle the fans while running the cooling or
heating tests. Automatic will automatically transition the fans as the
cooling or heating tests change. While the Manual transition will
only run the fans as set by the test points.

Cooling Test

The COOL submenu is used to change output status for the
individual compressors and Humidi- -MiZer system operation. The
HEAT submenu service test outputs are reset to OFF for the
cooling service test. Indoor fans and outdoor fans are controlled
normally to maintain proper unit operation when set for automatic
transition. The IDF SPEED TEST and ALL ODFSPD TEST can
be changed as needed for testing. These fans points show the
requested speed not actual speed. All normal cooling faults and
alerts are functional.
indoor fan, outdoor fans,

Heating Test

The HEAT submenu is used to change output status for the
individual heat stages, gas or electric. The COOL service test
outputs are reset to OFF for the heating service test. Indoor fan is
controlled normally to maintain proper unit operation when set for
automatic transition. The IDF SPEED TEST can be changed as
needed for testing and shows the requested speed not actual speed.
All normal heating faults and alerts are functional.
NOTE: When the IGC fan on command (IGC FAN REQUEST)
is active the fan may run when not expected.
Table 4 – Test Mode Unit Test Directory
Display Menu/Sub Menu/Name
UNIT TESTS
TEST MODE
SERVICE TEST
INDEPENDENTS
ECON POS TEST
BUMP COMP A1 TEST
BUMP COMP A2 TEST
LIQ DIVERT A TEST
REHEAT A TEST
CCH RELAY 1 TEST
ALARM RELAY TEST
PE1 RELAY TEST
PE2 RELAY TEST
FAN TESTS
IDF SPEED TEST
ALL ODF SPD TEST
ODF 1 SPEED TEST
ODF 2 SPEED TEST
ODF 3 SPEED TEST
IDF TRANSITION
ODF TRANSITION
COOL
COOL A1 TEST
COOL A2 TEST
IDF SPEED TEST
ALL ODF SPD TEST
HUMIDIMIZER TEST
HEAT
HEAT 1 TEST
HEAT 2 TEST
IDF SPEED TEST
AUTOMATIC TEST
AUTO INDP TEST
AUTO COOL TEST
AUTO HEAT TEST
AUTO SYSTEM TEST
11
Expanded Name Values
Unit Tests Menu
Service Test Mode Enable Off/On
Service Test Menu
INDEPENDENT TEST MENU
Economizer Position Test 0 to 100
Compressor Bump A1 Test Off/On
Compressor Bump A2 Test Off/On
Liquid Divert A Test Off/On
Reheat A Test Off/On
Crankcase Heater 1 test Off/On
Alarm Output Relay Test Off/On
Power Exhaust 1 Test Off/On
Power Exhaust 2 Test Off/On
Indoor and Outdoor Fan tests
Indoor Fan Speed Test 0 to 100
System ODF speed test 0 to 2000
Outdoor Fan 1 speed test 0 to 2000
Outdoor Fan 2 speed test 0 to 2000
Outdoor Fan 3 speed test 0 to 2000
IDF Test Transition Type Automatic/
Manual
ODF Test Transition Type Automatic/
Manual
Cooling Status Menu
Cooling W/Comp.A1 Test Off/On
Cooling W/Comp.A2 Test Off/On
Indoor Fan Speed Test 0 to 100
System ODF speed test 0 to 2000
Humidi---MiZer R system test 0 = off
1 = Subcool
2 = Reheat
Heating Status Menu
Heating Stage 1 Test Off/On
Heating Stage 2 Test Off/On
Indoor Fan Speed Test 0 to 100
Automatic Test Menu
AUTO INDEPENDENT TEST Yes/No
RUN AUTO COOLING TEST Yes/No
RUN AUTO HEATING TEST Yes/No
RUN AUTO SYSTEM TEST Yes/No