mypros+
Error code reference

Cove Dishwasher Error Code 050117

Wash pump drive system

Cove codesCove dishwasher codes

Wash pump drive system: Under voltage Vbus error.

First step from the service manual

Replace the MCM assembly.

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 050117.

  • 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 050117 means on a Cove dishwasher

Error code 050117 on a Cove dishwasher indicates an under voltage condition on the Vbus within the wash pump drive system. The Vbus, or DC bus voltage, is the internal high-voltage DC supply rail that powers the variable frequency drive (VFD) or motor control circuitry responsible for running the wash pump motor. When this rail drops below the expected operating threshold, the drive system cannot reliably control the pump motor, and the control board triggers this fault to protect the components from damage caused by insufficient power.

The Motor Control Module (MCM) assembly is the primary component governing this drive system. It converts incoming AC power to the regulated DC bus voltage and then synthesizes the appropriate output to spin the wash pump motor at the correct speed and torque. An under voltage Vbus fault typically means the MCM is not generating or sustaining the required DC bus level. This can result from internal component failure within the MCM itself, such as a failed rectifier, capacitor degradation, or a failed power stage. It can also stem from inadequate or unstable AC input power reaching the MCM.

Because the MCM assembly integrates the power conversion, motor drive, and monitoring functions into a single unit, individual component-level repair is generally not practical in the field. The diagnostic approach directs technicians to replace the MCM assembly as the first and primary corrective action. Before replacement, it is worth confirming that the incoming AC supply voltage to the unit is within specification and that wiring connections to the MCM are secure and free of corrosion or damage.

Source: manufacturer service documentation.

Common causes of 050117

  1. 01

    Failed MCM Assembly

    Part replacement

    The Motor Control Module itself has an internal failure, such as degraded capacitors or a failed rectifier, that prevents it from maintaining the required DC bus voltage. This is the most common cause and the primary component targeted for replacement.

  2. 02

    Low or Unstable Incoming AC Voltage

    Wiring / connection

    If the AC supply voltage at the dishwasher's connection point is below the required operating range, the MCM cannot generate a sufficient Vbus. Check the wall outlet or junction box voltage with a multimeter to rule this out before replacing the MCM.

  3. 03

    Loose or Corroded Wiring Connections

    Wiring / connection

    Poor connections in the power wiring harness leading to the MCM can cause voltage drops that trigger this fault. Inspect connector pins and terminal contacts for corrosion, burning, or looseness.

  4. 04

    Wash Pump Motor Drawing Excessive Current

    Part replacement

    A failing or seized wash pump motor can place an excessive load on the MCM drive circuit, causing the Vbus to collapse under the strain. If the MCM replacement does not resolve the fault, the wash pump motor should be inspected.

See the test procedure for each cause

Frequently asked questions about 050117

What does 050117 mean on a Cove dishwasher?
Error code 050117 indicates an under voltage condition on the Vbus within the wash pump drive system. The DC bus voltage inside the Motor Control Module has dropped below the level needed to properly power and control the wash pump motor. This fault is generated by the MCM to prevent damage from running the motor under insufficient voltage conditions. The primary corrective action is replacement of the MCM assembly.
Can I fix error code 050117 on my Cove dishwasher myself?
Resolving this error requires replacing the Motor Control Module assembly, which involves working with components that handle high-voltage AC and DC power. While a knowledgeable technician can perform this repair, it is not recommended as a DIY task for most homeowners due to the electrical safety risks involved. Confirming stable incoming AC voltage at the dishwasher connection is a safe preliminary check anyone can perform.
Will resetting my Cove dishwasher clear error code 050117?
A power reset may temporarily clear the fault display, but the underlying cause will cause the error to return as soon as the dishwasher attempts to run the wash pump again. If the MCM assembly has an internal failure or the input voltage problem has not been corrected, the fault will persist. A reset alone is not a fix for this error code.
Is it safe to use my Cove dishwasher while error code 050117 is active?
The dishwasher will typically not complete a wash cycle while this fault is active because the wash pump cannot be properly driven. Attempting repeated cycles will not resolve the issue and may place additional stress on the MCM. It is best to stop using the appliance and arrange for service until the fault is diagnosed and corrected.
How much does it cost to repair error code 050117 on a Cove dishwasher?
Repair costs depend on whether the issue is the MCM assembly, wiring, or input power supply. If the MCM assembly requires replacement, parts and labor costs can vary widely, generally ranging from a few hundred dollars to over five hundred dollars depending on parts pricing and local labor rates. A qualified technician should diagnose the root cause before parts are ordered to avoid unnecessary expenses.

Related Cove dishwasher codes

All Cove dishwasher codes
View all 62 Cove dishwasher codes

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

Get Started

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