mypros+
Error code reference

Speed Queen Dryer Error Code PAYMENT SYSTEM COMM ERROR

Communication error occurred with the Serial Payment System

Speed Queen codesSpeed Queen dryer codes

Communication error occurred with the Serial Payment System. Type 1 shows error code for 2 seconds. Type 2 (codes 11, 18, 19) puts machine in Machine Error Mode until communications restored.

First step from the service manual

Check payment system connections. Machine returns to previous state once communications are restored.

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 PAYMENT SYSTEM COMM ERROR.

  • 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

What PAYMENT SYSTEM COMM ERROR means on a Speed Queen dryer

The PAYMENT SYSTEM COMM ERROR on a Speed Queen dryer indicates a loss of communication between the dryer's main control board and the Serial Payment System. This error is specific to commercial or laundromat-configured Speed Queen dryers equipped with coin-operated or card-based payment hardware. The payment system communicates with the control board via a serial data connection, and any interruption in that signal path triggers this fault code.

The error presents differently depending on the machine type. A Type 1 machine displays the error code briefly for approximately 2 seconds before returning to normal operation. A Type 2 machine, however, enters Machine Error Mode when specific codes (11, 18, or 19) are generated, and it remains in this locked-out state until the serial communication link with the payment system is fully restored. This distinction is important because a Type 2 machine will not accept cycles or operate normally until the underlying communication fault is resolved.

Common causes include loose or corroded wiring connectors between the payment module and the control board, a failed or unresponsive payment system module, damaged serial communication wiring, or a control board that is no longer able to process the serial data signal. Power interruptions can also temporarily disrupt the handshake between components, sometimes clearing on their own once power is stabilized.

Source: manufacturer service documentation.

Common causes of PAYMENT SYSTEM COMM ERROR

  1. 01

    Loose or disconnected wiring connector

    Wiring / connection

    The serial communication cable between the payment module and the control board may have worked loose. Inspect all connectors at both the payment system and the control board for secure seating.

  2. 02

    Corroded or damaged connector pins

    Part replacement

    In high-humidity laundromat environments, connector pins can corrode and break the data signal. Look for discoloration, oxidation, or physical damage at the serial communication connector.

  3. 03

    Failed payment system module

    Part replacement

    The coin acceptor, card reader, or payment control board itself may have failed and stopped transmitting serial data. If connections check out, the payment module likely needs replacement.

  4. 04

    Damaged serial communication wiring

    Part replacement

    The wiring harness carrying the serial signal can suffer cuts, pinches, or breaks over time. Trace the full length of the communication wiring for any visible damage.

  5. 05

    Temporary power disruption

    Wiring / connection

    A brief power fluctuation can interrupt the serial handshake between components. On Type 1 machines, the error may self-clear once stable power is restored without any further action needed.

See the test procedure for each cause

Frequently asked questions about PAYMENT SYSTEM COMM ERROR

What does PAYMENT SYSTEM COMM ERROR mean on a Speed Queen dryer?
This error means the dryer has detected a communication failure between its main control board and the Serial Payment System, such as a coin acceptor or card reader. On Type 1 machines, the error displays for 2 seconds and the machine continues operating. On Type 2 machines, codes 11, 18, or 19 trigger Machine Error Mode, preventing operation until communications are restored.
How do I fix a PAYMENT SYSTEM COMM ERROR on a Speed Queen dryer?
Start by inspecting all wiring connections between the payment module and the control board, ensuring every connector is fully seated and free of corrosion. If connections appear sound, check the serial communication wiring for damage along its full length. If the wiring and connectors are in good condition, the payment system module itself may need to be replaced.
Will resetting the dryer clear the PAYMENT SYSTEM COMM ERROR?
A power reset may temporarily clear the fault on a Type 1 machine if the disruption was caused by a brief power fluctuation. However, on Type 2 machines, the dryer will remain in Machine Error Mode regardless of resets until the actual serial communication link with the payment system is physically restored. Resetting will not resolve a failed module or damaged wiring.
Is it safe to use the dryer when it shows a PAYMENT SYSTEM COMM ERROR?
The error relates to communication with the payment hardware, not to the dryer's heating or mechanical systems, so there is no immediate safety risk associated with the fault itself. On Type 2 machines, the dryer will refuse to operate in Machine Error Mode, which prevents use until the issue is corrected. A Type 1 machine may continue running, but the underlying communication problem should still be diagnosed promptly.
How much does it cost to repair a PAYMENT SYSTEM COMM ERROR on a Speed Queen dryer?
If the fix is simply reseating a loose connector, there may be no parts cost, though a service call from a commercial appliance technician typically runs in the range of $75 to $150. If the payment system module needs replacement, parts and labor combined can range from $150 to $400 or more depending on the specific payment hardware installed. Wiring harness repairs fall somewhere in between depending on the extent of the damage.

Related Speed Queen dryer codes

All Speed Queen dryer codes
View all 27 Speed Queen dryer codes

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

Get Started

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