What causes a Carrier Refrigerator to not defrost manually?
If your Carrier Refrigerator unit will not defrost manually, it could be due to a defective manual defrost switch (replace it) or an open defrost temperature sensor (4.9.5).
What causes abnormal currents in Carrier Refrigerator?
If your Carrier Refrigerator unit reads abnormal currents, check the current sensor wiring.
What to do if relay drops out when Carrier Refrigerator initiates?
If the Carrier Refrigerator initiates but the relay (DR) drops out, it could be due to low line voltage (2.3).
What causes low suction temperature in Carrier Refrigerator?
If your Carrier Refrigerator shows a low suction temperature, it could be due to a discharge temperature sensor drifting low (replace it) or a loose or insufficiently clamped sensor (replace it).
What causes high discharge temperature in a Carrier Refrigerator?
If your Carrier Refrigerator displays a high discharge temperature, it could be due to a discharge temperature sensor drifting high (replace it), a failed economizer, TXV, or solenoid valve (replace it), a plugged economizer, TXV, or solenoid valve (replace it), a loose or insufficiently clamped sensor (replace it), or a failed liquid injection solenoid valve (replace it).
Why is the evaporator coil blocked in my Carrier Refrigerator?
If your Carrier Refrigerator's evaporator coil is blocked, it may be due to frost on the coil (5.6) or a dirty coil (6.15).
What causes high suction pressure with low superheat in Carrier Refrigerator?
If your Carrier Refrigerator has high suction pressure with low superheat, the superheat setting may be too low (6.14), the external equalizer line may be plugged or ice is holding valve open, or there may be foreign material in the valve (6.14).
What causes low suction pressure with high superheat in Carrier Refrigerator?
If your Carrier Refrigerator shows low suction pressure with high superheat, potential causes include low refrigerant charge (6.7.1), a plugged external equalizer line (open it), wax, oil, or dirt plugging the valve or orifice, ice formation at the valve seat (6.14), incorrect superheat (6.7.1), or power assembly failure (66.1144).
Why do suction and discharge pressures equalize in my Carrier Refrigerator?
If the suction and discharge pressures tend to equalize when your Carrier Refrigerator is operating, it could be due to the compressor operating in reverse (5.14) or the compressor cycling/stopped (check).
Why is the discharge pressure high in my Carrier Refrigerator?
To address high discharge pressure in your Carrier Refrigerator, check for a dirty condenser coil (clean it), ensure the condenser fan is rotating in the correct direction, and verify that the condenser fan is operational. Also, check for refrigerant overcharge or noncondensibles. Make sure the discharge service valve is fully open, and inspect the suction modulation valve for any malfunctions.
General safety notices supplementing specific warnings and cautions for operation and maintenance.
Precautions for safe operation of the unit, including safety glasses and working in pairs.
Precautions for maintenance, emphasizing power disconnection and securing the unit.
Listing of specific warnings and cautions applicable to the refrigeration unit.
Controller monitoring of compressor temperatures and pressures for protection.
Information on controller alarms, their generation, and display.
Details the independent controller function for automatic or manual pre-trip testing.
Overview of the DataCORDER software for temperature recording and parameter logging.
Pre-operation inspection checklist for the refrigeration unit and container.
Instructions for safely starting and stopping the unit.
Steps for performing a start-up inspection of the unit.
Details automatic testing of unit components using internal measurements.
Troubleshooting for units that fail to start or stop intermittently.
Troubleshooting for units that run continuously during cooling operation.
Troubleshooting for units that run but do not provide adequate cooling.
Troubleshooting for units that fail to heat or provide insufficient heating.
Troubleshooting for units that fail to stop heating operation.
Troubleshooting for units that do not initiate or complete defrost cycles.
Troubleshooting for abnormal high or low pressures during cooling.
Troubleshooting for abnormal noise or vibrations from the compressor or fans.
Troubleshooting for controller issues, including loss of control or wiring faults.
Troubleshooting for lack of or restricted airflow from the evaporator.
Troubleshooting for issues related to the thermostatic expansion valve.
Troubleshooting for autotransformer issues, such as unit not starting.
Troubleshooting for water-cooled condenser and water pressure switch faults.
Troubleshooting for compressor operating in reverse, warning about internal damage.
Troubleshooting for abnormal discharge or suction temperatures.
Troubleshooting for abnormal current readings from the unit.
Description of service valves, their function, and operation.
Use of manifold gauge set for system pressure, charging, and evacuation.
Procedure for pumping down the unit to service specific components.
Recommended procedures for finding refrigerant leaks in the system.
Procedures for evacuating and dehydrating the refrigeration system.
Procedures for checking and adding refrigerant charge to the system.
Information and procedures related to the RSH105 compressor.
Step-by-step instructions for removing and replacing the compressor.
Procedures for checking and adding compressor oil.
Procedures for replacing and checking the high pressure switch.
Step-by-step instructions for replacing the high pressure switch.
Procedure for testing the high pressure switch functionality.
Instructions for cleaning and replacing the condenser coil.
Procedures for servicing the condenser fan and motor assembly.
Information on checking and replacing the filter-drier.
Description and procedures for servicing evaporator and economizer expansion valves.
Procedure for checking superheat for the evaporator expansion valve.
Instructions for removing and installing expansion valves.
General| Brand | Carrier |
|---|---|
| Model | Streamline Scroll 69NT20-531-300 |
| Category | Refrigerator |
| Language | English |
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