30
Troubleshooting
Service Manual
SKOPE Reflex Upright Fridge, Freezer, Combo
Refrigeration System
The following diagnostic test is useful for workshop diagnosis of a short of
gas situation. Perform the test before opening the refrigeration system.
It is beneficial to have a correctly operating unit running beside the unit being
serviced to compare behaviour.
Note: These diagnostic procedures are indicative only.
Refrigeration system diagnostic test (perform in suitable workshop)
1. Unplug the cabinet from the power supply, and if necessary remove the
refrigeration cartridge including controller and wiring loom assembly.
2. Unplug the evaporator fan motor (white 4-pin plug) from the wiring loom.
3. Install door switch jumper (white 2-pin plug) into wire harness.
4. Remove the evaporator tub cover and install blocker to prevent condenser
airflow from affecting evaporator coil.
5. Connect the refrigeration cartridge to the power supply and allow to run for
approximately 10 minutes until the evaporator temperature stabilises.
6. Optional: For enhanced diagnostics, connect to the controller via Bluetooth
enabled device with WDT SCS Connect Field app.
7. Refer to the relevant table below as a guideline to determine if the system
charge is correct at typical ambient condition around 25°C.
Continued over page
RF7.UPR.1.SD (cartridge UTKCNI-0017)
RF7.UPR.2.SD (cartridge UTKCNI-0018)
RF7.UPF.1.SD (cartridge UTKDNI-0019)
Observation 50% charged 75% charged 100% charged
Suction pipe at
compressor
Suction dry Suction cold Frost back to
compressor shell
Evaporator coil
Top row return
bends frosted
½ return bends frosted All return bends
frosted
Unit power <110W 110W to 115W >115W
Evaporator
temperature
>-5°C -10°C to -12°C <-15°C
Observation 50% charged 75% charged 100% charged
Suction pipe at
compressor
Suction dry Suction cold Suction cold
Evaporator coil
Top row return
bends frosted
½ return bends frosted All return bends
frosted
Unit power <150W 150W to 160W >160W
Evaporator
temperature
>-5°C -10°C to -12°C <-15°C
Observation 50% charged 75% charged 100% charged
Suction pipe at
compressor
Suction cool and
dry
Suction cold and wet Frost back to and on
compressor shell
Evaporator coil
All return bends
frosted
All return bends frosted All return bends
frosted
Unit power <450W 500W to 520W >530W
Evaporator
temperature
>-25°C <-25°C <-25°C
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