Thermo King 920000, Manual

Page: 52 / 190

Operating Instructions
52
NOTE: A unit that is equipped with
CYCLE-SENTRY should be manually started if
it has been turned off long enough for the engine
to become cold soaked at temperatures below
30 F (-1 C). Place the Auto Start/Stop -
Continuous Run switch in the Cont Run position
and refer to “Manually Starting Units on Diesel
Operation” on page 50. After this initial cold
start, the Auto Start/Stop - Continuous Run
switch can be switched to the CYCLE-SENTRY
position. CYCLE-SENTRY sensors will then
automatically maintain temperatures and
provide reliable unit restarts on demand.
Fully charged batteries in good condition are
essential for reliable unit operation. This is
especially true on CYCLE-SENTRY equipped
units in cold weather.
1. Place the Diesel/Electric switch in the Diesel
position and place the power receptacle
On/Off switch in the On position.
2. Place the CYCLE-SENTRY switch in the
CYCLE-SENTRY position.
3. Place the control box On/Off switch in the On
position.
4. Press the
O
N
key in the cab control box. The
CYCLE-SENTRY indicator light will come
on. (This light must be on at all times while
the unit is in CYCLE-SENTRY operation.) If
a malfunction occurs preventing a restart, the
fact that this light is off is the only indication a
malfunction has occurred.
5. Set each thermostat at the required
temperature. Do not set a thermostat lower
than required (lowering the thermostat
setpoint does not make the unit cool faster).
6. If a thermostat calls for Cool or Heat, the glow
plugs will automatically heat for the required
amount of time depending on the engine
temperature (5 seconds at 150 F [66 C] to
120 seconds at -20 F [-29 C]).
7. At the end of the preheat period, the engine
will begin cranking. The glow plugs remain
energized during the cranking period. If the
engine RPM does not exceed 50 RPM during
the first 4 seconds of cranking, or if the engine
does not start after 30 seconds of cranking, the
cranking cycle terminates.
NOTE: If the engine fails to start, the unit
reset switch will open, interrupting current to
the control system about 40 seconds after
cranking cycle terminates.
8. If the engine fails to start, place the control
box On/Off switch in the Off position.
Determine and correct the cause of the failure,
then push in the reset button and repeat the
starting procedure.
Starting the Unit—Electric
Operation
1. Place the Diesel/Electric switch in the Electric
position.
2. Make sure that an On/Off switch is in the Off
position and that the electric standby power
supply is turned off.
3. Connect the power receptacle to the power
supply. Make sure that the power supply is the
correct voltage, phase, and frequency.
4. Turn the high voltage power supply on.
5. Place the On/Off switches in the On position
and press the
O
N
key.
CAUTION: Always turn off the electric
power supply when handling, connecting,
or disconnecting high voltage power
cords.
CAUTION: Do not start the electric motor
unless the diesel engine is completely
stopped.