Sunlight Supply Samsung Programmable Thermostat for Split Systems - Manual (Page 106)

12-43 Samsung Electronics
12-2-10 DC-Link voltage sensor error
1. Checklist :
1) Is the connection of R, S, T power wire normal?
2) Are Relay RY21 and R200 on the INVERTER PCB mounted normally?
2. Troubleshooting procedure
Yes
No
Check and correct the wire connection
Are connection of the wire from INVERTER PBA to
EMI PBA normal?
Exchange INVERTER PCB