3--1
T--30404/08
SECTION 3
OPERATION BT324 CONTROLLER
3.1 STARTING, STOPPING AND OPERATING
INSTRUCTIONS
The BT324 Carrier Sutrak Digital Display (CSDD) is
marked with international symbols (See Figure 3--2).
Before starting, electrical power must be available from
the bus power supply (See Figure 3--1).
A 150 Amp @12 VDC or a125 Amp @ 24 VDC fuse in
the battery compartment passes power for the clutch,
evaporator and condenser assemblies.
A/C
Figure 3--1 Bus Dash With A/C Switch & BT324 CSDD Controller
3.1.1 Starting
a. If the engine is not running, start the engine.
b. When the 12/24VDC power is applied, the driver dis-
play will illuminate and show return air set point.
Press the A/C key (Item 5 Figure 3--2) on the display
to trigger the start up sequence.
c. After the pre--trip inspection is completed, the
switches may be set in accordance with the desired
control modes.
3.1.2 Stopping
Toggling the A/C key (Item 5 Figure 3--2) on the display
again will stop the system operation.
3.2 PRE--TRIP INSPECTION
After startingsystem, allowsystemto stabilizefor tento
fifteen minutes and check for the following:
a. Listen for abnormal noises in compressor or fan mo-
tors.
b. Check compressor oil level (05G Compressor only).
c. Check refrigerant charge. (Refer to section 5.8.1 )
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