38
Replacement Procedures
Service Manual
SKOPE BME-N ActiveCore
Compressor
Electrics
The compressor electrics are located on the front of the compressor.
To access the compressor electrics, remove the refrigeration cartridge (see page 31) and
cartridge cover (see page 34). The capacitor unclips from the relay cover, and the relay cover
unclips from the compressor.
Refrigeration Cartridge
Cartridge
Removal
For detailed instructions on removing the cartridge, refer to the unit removal instructions on the
instruction sheet attached to the back of the cabinet, or on page 31 of this service manual.
Diagnostics The following test is useful in the workshop to diagnose a short of gas situation. Perform the
test before opening the refrigeration system.
It is useful to have a correctly operating cartridge running beside the cartridge being serviced
to compare behaviour.
Note: These diagnostic procedures are indicative only.
Procedure 34: Refrigeration system diagnostic test
Before you start
Make sure you are in a suitable workshop (see page 30).
1. Disconnect the cabinet from the mains power supply (see page 22).
2. Remove the refrigeration cartridge.
3. Remove the cartridge cover.
4. Place the cartridge on bench and connect the service probe to the red plug on the cartridge.
5. Connect the refrigeration cartridge to the mains power supply and allow to run for approximately
10 minutes until the evaporator temperature stabilises.
6. Refer to the table below to determine if the system charge is correct.
A system with the correct refrigerant charge will frost back towards the compressor. The point where
the frost stops is affected by the ambient temperature.
The table below details the frost stop point on a correctly charged system running on the bench.
7. If the suction pipe frosts to the appropriate frost stop point, the charge is likely correct. If the frost
does not go back to the point shown there may be a capillary blockage or compressor fault.
8. Use the table below to determine whether the system is short of refrigerant or a has blocked
capillary.
9. After fault has been diagnosed and repaired, reassemble the refrigeration system and test run.
Ambient 50% charged 75% charged 100% charged
10°C Cold with light sweat Cold with light sweat Frosting to compressor
20°C Cold with light sweat Sweating 50mm from
compressor
Frosting to compressor
30°C Dry Dry Frosting 20mm from compressor
40°C Dry Dry Sweating 50mm from compressor
Diagnosis Frost back (after 10 mins)
Blocked capillary None
Normal operation Refer to table above
To Next Page
Loading...
