Run capacitor
Common no-start and weak-compressor failure point. Match the microfarad and voltage rating.
Samsung DVM S VRF System Error Codes
Samsung DVM S (Digital Variable Multi System) displays fault codes on the remote controller or NASA (Network Airconditioning System for Apartments) controller. Codes appear as C-series (e.g., C4-01) or E-series on older units. Samsung SmartThings Pro allows remote diagnostics.
DVM S Fault Code Table
| Code | Fault Description | Common Cause | Action |
|---|---|---|---|
| C4-01 | Indoor intake sensor | Sensor open or short | Check sensor resistance |
| C4-02 | Indoor pipe sensor | Liquid or suction sensor fault | Replace thermistor |
| C4-03 | Indoor PCB fault | Control board failure | Replace indoor PCB |
| C4-11 | Communication error | Indoor-outdoor bus fault | Check NASA network wiring |
| C4-17 | Indoor fan motor fault | Motor failure or PCB driver | Check motor and driver |
| C1-01 | Outdoor PCB fault | Outdoor control board | Replace outdoor PCB |
| C1-02 | High-pressure fault | Dirty coil, overcharge | Wash coil, verify charge |
| C1-03 | Low-pressure fault | Low refrigerant or EEV fault | Check charge and EEV |
| C1-12 | Discharge temp high | Low refrigerant, blocked EEV | Check charge, EEV operation |
| C1-17 | Outdoor fan motor fault | Motor or driver PCB failure | Check motor amps |
| C1-22 | Compressor overcurrent | Compressor protection | Check compressor winding |
| C1-27 | Inverter fault | Inverter PCB failure | Check DC bus and inverter |
| C2-01 | Branch controller PCB | BC controller failure | Replace BC controller |
Most Common DVM S Faults
C4-11 - Communication Error
Samsung DVM S uses a proprietary NASA protocol communication bus. The bus is a 2-wire network. Check all indoor and outdoor communication terminals, verify no wire damage, and confirm all units have unique addresses.
C1-02 - High-Pressure Fault
HP switch set at 590 psi for R-410A. In cooling: dirty outdoor coil, blocked airflow, refrigerant overcharge. In heating: dirty indoor coil or low indoor airflow. Always wash coil and check airflow first.
C1-12 - Discharge Temperature High
Critical fault - if discharge exceeds 230 degrees F, the compressor is at risk. Check refrigerant charge using Samsung’s charging table. Verify EEV at outdoor unit is operating - use Samsung system controller to monitor EEV position.
C1-27 - Inverter Fault
DVM S uses a variable-speed scroll compressor. Measure DC bus voltage (should be 300-350 VDC from 240 VAC). Check inverter board for burned IGBT modules. Contact Samsung commercial support before condemning inverter.
Parts Commonly Needed
| Part | Notes |
|---|---|
| Outdoor PCB | Samsung commercial parts - match DVM S model |
| Indoor PCB | Match indoor unit model |
| EEV | Match valve size |
| Inverter board | High cost - verify fault first |
| Outdoor fan motor | Match HP and frame type |
Need Replacement Parts?
Before ordering, match the HVAC part to the model number, electrical rating, and failure symptom. Check current prices on Amazon - prices and availability change frequently.
Pro tip: Samsung DVM S systems support SmartThings Pro for remote monitoring. Fault codes, pressures, and temperatures can be viewed remotely - enroll system for proactive fault notification.