Error code reference

Samsung Dishwasher Error Code AC2

Communication failure

Communication failure: no response from Inverter PBA for 2 seconds; Inverter Relay 1 min off then retry until response found; display changes to pause.

First step from the service manual

Check the connections between Main PBA CN1 connector and Inverter PBA CN1 connector.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

MyPros+ Max

Get the full diagnostic procedure for AC2.

Step-by-step tests with expected resistance, voltage, and continuity values
Wiring diagram references and connector pinouts from the OEM service manual
Verified part numbers when replacement is required

Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

M+

M+ Max·Samsung Dishwasher

AC2 on my Samsung DW80R5060US

M+

Communication failure: no response from

From Service Manual 400644, p.16:

1.Check the connections between Main PBA CN1 connector and Inverter PBA CN1 connector.

2.Inspect the communication harness between the main control and the UI board for bent pins or unseated connectors at each end.

3.Measure supply voltage to the UI board. Expected: 5 VDC at the interface connector; a low or missing rail points back to the main control supply.

Part DA41-00651R

Display board

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass

First step from the service manual

Get the full diagnostic procedure for AC2.

Related Samsung dishwasher codes