Thermo King T-1000R, Руководство по обслуживанию

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Refrigeration Maintenance 10-33
Installation
1. Clean the tubes for soldering.
2. Place the new DPR in the same position from which the old one was removed.
3. Use a heat sink or wrap the DPR with a wet rag to prevent damage and solder the tubing connections.
4. Install the mounting clamp on the DPR.
5. Pressurize the system and test for refrigerant leaks.
6. If no leaks are found, replace the liquid line drier then evacuate the system.
7. Recharge the unit with the proper refrigerant and check the compressor oil.
8. Run the unit and test the DPR. Adjust the setting if necessary.
DISCHARGE PRESSURE TRANSDUCER TESTING
The discharge pressure transducer is located on the discharge line near the discharge service port.
The discharge pressure transducer supplies pressure information to the SR-2/SR-3 Microprocessor Control System. Alarm
Code 86 (Check Discharge Pressure Sensor) indicates a possible problem with the discharge pressure transducer. The pressure
reading can be monitored with a Mechanics/Premium HMI Control Panel by entering the Gauges Menu. Check the reading by
comparing it to the reading on a gauge attached to the discharge service port. Refer to the appropriate Microprocessor Diagnostic
Manual for more information about the testing and operation of the discharge pressure transducer.
DISCHARGE PRESSURE TRANSDUCER REPLACEMENT
Removal
1. Recover the refrigerant charge.
2. Disconnect the wires and remove the discharge pressure transducer from the discharge tube.
Installation
1. Apply a refrigerant Loctite to the threads of the discharge pressure transducer.
2. Install and tighten the discharge pressure transducer and reconnect the wires.
3. Pressurize the system and test for leaks.
4. If no leaks are found, evacuate the
system.
5. Recharge the unit with refrigerant and check the compressor oil.
DISCHARGE STRAINER TEST
If the discharge strainer is plugged or restricted, the unit will stop very quickly after it starts to run and will record Alarm Code
10 (High Discharge Pressure). This can also be caused by a faulty HPCO. It can be difficult to determine whether the discharge
strainer of the HPCO is causing this problem. See the following procedure and guidelines.
1. Connect a high pressure gauge to the discharge service valve to monitor the discharge pressure.
2. Start the unit while watching the discharge pressure.
• If the discharge pressure quickly rises to the HPCO opening pressure (see “Specifications”) before the unit stops, it is more
likely to be a plugged discharge strainer.
• If the unit stops before the discharge pressure rises to the HPCO opening pressure (see “Specifications”), it is more likely
to be a faulty HPCO.
Because the refrigerant charge must be recovered to replace the discharge strainer, it is best to replace the HPCO and retest
the unit if you are not sure which is causing the problem.
If the discharge strainer is plugged it is important to determine and repair the cause of the debris.