Controller Troubleshooting; Controller Programming Procedure; Figure 7.19 Controller Section Of The Control Box - Carrier PrimeLINE 69NT40-561-200 Operation And Service Manual

7.27.2

Controller Troubleshooting

A group of test points (TP, see
schematic diagram sections). A description of the test points follows:
Use a digital voltmeter to measure AC voltage between TP's and ground (TP9), except for TP8.
TP 1 - Not used in this application.
TP 2 - Check if the high pressure switch (HPS) is open or closed.
TP 3 - Check if the water pressure switch (WP) contact is open or closed.
TP 4 - Check if the internal protector for the condenser fan motor (IP-CM) is open or closed.
TP 5 - Check if the internal protectors for the evaporator fan motors (IP-EM1 or IP-EM2) are open or closed.
TP 6 (if equipped) - Check if the controller liquid injection valve relay (TQ) is open or closed.
TP 7 - Check if the controller economizer solenoid valve relay (TS) is open or closed.
TP 8 - Not used in this application.
TP 9 - Chassis (unit frame) ground connection.
TP 10 - Check if the heat termination thermostat (HTT) contact is open or closed.
C o n t r o l l e r S o f t w a r e
Programming Port
7.27.3

Controller Programming Procedure

The unit must be OFF whenever a programming card is inserted or removed from the controller
programming port.
1. Place the Start-Stop switch (ST) to "0" to turn the unit Off.
2. Insert software/programming PCMCIA card containing the following (example) files into the programming/
software port. (See
menuDDMM.ml3, this file allows the user to select a file/program to upload into the controller.
cfYYMMDD.ml3, multi-configuration file.
3. Place the Start-Stop switch (ST) to "I" to turn the unit On.
T-362
Figure 7.19) are provided on the controller for troubleshooting electrical circuits (see

Figure 7.19 Controller Section of the Control Box

Mounting Screw
!
Figure 7.19)
NOTE
CAUTION
7–30
Controller
Test Points