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 ΓÇö 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 ΓÇö 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 ΓÇö Discharge Temperature High
Critical fault ΓÇö if discharge exceeds 230┬░F, the compressor is at risk. Check refrigerant charge using Samsung’s charging table. Verify EEV at outdoor unit is operating ΓÇö use Samsung system controller to monitor EEV position.
C1-27 ΓÇö Inverter Fault
DVM S uses a variable-speed scroll compressor. Measure DC bus voltage (should be 300ΓÇô350 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 | Amazon | Samsung commercial parts ΓÇö match DVM S model |
| Indoor PCB | Amazon | Match indoor unit model |
| EEV | Amazon | Match valve size |
| Inverter board | Amazon | High cost ΓÇö verify fault first |
| Outdoor fan motor | Amazon | Match HP and frame type |
Pro tip: Samsung DVM S systems support SmartThings Pro for remote monitoring. Fault codes, pressures, and temperatures can be viewed remotely ΓÇö enroll system for proactive fault notification.