Scholtès Refrigerator / Freezer UV

Scholtès error code UV indicates: Scholtès Pure Cold Built-in Total NoFrost Refrigerator: Diagnostic code UV indicates inverter driver DC link under-voltage trip; compressor cannot maintain required torque..

The primary root cause for Scholtès code UV is: On Scholtès refrigerators (Scholtès Haute Horlogerie Culinaire sensors and micro-electronic platform architecture): Grid brownout drop below 180V AC, high-resistance wall outlet plug, or dried-out electrolytic reservoir capacitors (< 210V DC bus)..

To resolve error code UV: Verify line voltage under compressor startup load (min 207V AC). Check DC bus voltage on inverter board (trip occurs below 210V DC). Replace inverter board if supply is 230V AC. Press and hold Alarm Reset pad for 5 seconds, verify compartment display stops blinking, and allow 12h for complete stabilization.

Resetting power (unplugging for 5–10 minutes) clears temporary memory errors. However, if Scholtès code UV persists, the physical component causing On Scholtès refrigerators (Scholtès Haute Horlogerie Culinaire sensors and micro-electronic platform architecture): Grid brownout drop below 180V AC, high-resistance wall outlet plug, or dried-out electrolytic reservoir capacitors (< 210V DC bus). must be inspected or replaced.

Set a digital multimeter to ohms (Ω). Disconnect power and test Compressor Motor Windings (Run/Start) & Defrost Heater across Across 3 compressor pins (Common, Run, Start): R(C-S) + R(C-R) = R(S-R). Winding to earth: >20MΩ (OL).. Expected nominal reading is 15Ω–25Ω (Run C-R), 20Ω–35Ω (Start C-S), 200Ω–400Ω (Defrost Heater). PTC Relay: 10Ω–30Ω at 25°C.. Tolerance: ±10%. Any low insulation resistance to casing (<2MΩ) trips the breaker. Defrost bimetal reads <0.5Ω when sub-zero..

Standard electrical safety protocol: 1. Disconnect 230V mains power before opening panels. 2. Verify zero voltage at test points. 3. Allow hot water or heating elements to cool below 30°C before handling.