Thermo King KD-II SR, Manual

Page: 22 / 182

Unit Description (Rev. 04/03)
8
• Engine Tachometer Display
• Battery Voltage Display
• Phase Lockout (Model 50)
• Phase Correction (Optional, Model 50 Only)
• Automatic Diesel/Electric Selection
• Select up to 13 Readouts Covering All Key Operating
Parameters
• Phase Indication
• Programmable Setpoint Range
• Low Speed Start (Programmable)
• High Speed Pulldown (Programmable)
• Choice of Units of Measure
• Low Speed Lockin
UNIT INSTRUMENTS
1. MICROPROCESSOR LCD DISPLAY. The LCD
display normally shows the setpoint, the return air tem-
perature, and any active icons, which are:
• Cool
• Heat
• Defrost
• Setpoint
• CYCLE-SENTRY
• Alarm
• Electric (Optional)
Pressing the SELECT key causes the display to show
the other sensor readings.
2. ALARM ICON. The alarm icon comes on whenever
there is an alarm code stored in the microprocessor
memory.
3. RECEIVER TANK SIGHT GLASS. The receiver
tank sight glass is used to check the amount of refriger-
ant in the system, and the moisture content of the
refrigerant.
4. COMPRESSOR OIL SIGHT GLASS. The compres-
sor oil sight glass is used to check the relative level of
compressor oil in the compressor sump.
5. AIR RESTRICTION INDICATOR. An air restric-
tion indicator is attached to the intake manifold. Visu-
ally inspect the restriction indicator periodically to
assure the air filter is not restricted. Service the air filter
when the yellow diaphragm indicates 22 in. of water
column. Press the button on the top of the restriction
indicator after servicing the air filter.
UNIT PROTECTION DEVICES
1. FUSES. A number of fuses are located on the relay
board. The sizes and functions are shown in Table 1.
Table 1: Relay Board Fuse Size and Function
Fuse Size Function
F200 3A 2P Power to Microprocessor
F202 3A Oil Level Switch
F300 3A Pilot Solenoid
F301 3A TherMax Solenoid
F302 3A Alternator Relay
F303 3A Damper Relay
F304 3A Starter Relay
F305 3A On/Run Relay
F306 3A Preheat Relay
F307 3A Not Used
F308 3A Not Used
F309 15A Alternator Excitation
F310 15A Damper Solenoid
F311 3A Motor Reset Solenoid
F400 3A Motor Starter
F401 10A Fuel Solenoid and Fuel Pump
F402 10A Throttle Solenoid
F403 3A Heater Contactor