Thermo King 098916, Руководство по обслуживанию

Страница: 126 / 196

Electrical Maintenance
125
Figure 69: Compressor Discharge
Temperature Sensor
Compressor Discharge Gas
Temperature Sensor
A refrigerant injection system uses the
compressor discharge temperature to protect the
compressor from excessively high operating
temperatures.
If the vapor injection valve is off and the
compressor discharge gas temperature increases
to 138 C (280 F), the valve will be turned on.
When the discharge gas temperature decreases to
132 C (270 F), the vapor injection will be turned
off unless it is required to be on for other reasons.
The controller immediately stops unit operation if
the discharge gas temperature increases to 148 C
(298 F). The controller activates the Alarm LED
and records Alarm Code 56 (Compressor
Temperature Too High). The controller will restart
the unit when sensor temperature is below 90 C
(194 F).
Compressor Discharge
Temperature Sensor Replacement
The compressor discharge temperature sensor is
mounted externally on the compressor head. To
remove:
1. Shut off power to system.
2. Disconnect the compressor discharge sensor
wires from J-15--pins 9 & 10 located in the
control box on the main relay board.
3. Cut silicone seal under rim of sensor using
razor blade.
4. Remove old sensor and sensor wires.
5. Clean sensor seat using wire brush.
6. Blow out all debris using compressed air.
7. Apply 0.25 to 0.5 cc thermal grease to
mounting position of new sensor.
8. Add a bead of RTV silicone approximately 5
mm in diameter around area.
9. Press new sensor into position.
10. Route the new sensor wires into the control
box. Connect wires to J-15--pins 9 & 10 on
the main relay board.