UniMac Washer-Extractor Error Code E d 67: Motor Initialization Error
E d 67 is a motor initialization error on a UniMac QN washer-extractor. The drive could not finish the start-up routine that prepares it to drive the motor. Take the machine off power, try one start, and call us if it returns.
Medium: the drive stops before the cycle begins, but nothing suggests danger in the drum.
- Code
- E d 67
- Maker
- UniMac
- Equipment
- Industrial laundry
- Applies to
- CHM1792C family washer-extractor (QN models, 20-100 lb) front-end control
What does UniMac error code E d 67 mean?
E d 67 is a motor initialization error on a UniMac QN washer-extractor such as the UCA020QN. Before the drive turns the motor for the first time in a cycle, it runs a short preparation routine that gets the drive and the motor ready to work together. If that routine cannot be completed, the drive does not go on to spin the drum. The cycle stops at the beginning, and the code stays until power is cycled.
Since the routine involves both the motor and the board, any of the pieces can be behind it. A loose or damaged motor harness connector at the drive is the simplest. A motor with a winding problem can stop the routine. A drive board that cannot finish its own motor preparation is another candidate. Weak or unstable power at the drive during power-up can interrupt the process too.
The maker's own step for clearing this code is taking the machine off power, which restarts the routine.
Affected models and control systems
E d 67 is listed for the CHM1792C family washer-extractors, the QN models from 20 to 100 lb, with the front-end control and drive board; the manual's example model is the UCA020QN.
Code numbers and their meaning can change between control generations. We match the full model and control before acting on a code.
What you may notice
- The display shows E d 67 at the very start of a cycle
- The drum makes no attempt to move
- The code clears and returns on the next start
- Power-up seems normal until a cycle is requested
Possible causes
Listed in UniMac's documentation
- A loose or damaged motor harness connector at the drive
- A motor with a winding problem that stops the start-up routine
- A drive board that cannot finish its motor preparation routine
- Weak or unstable power at the drive during power-up
Other likely causes — what usually sits behind error code E d 67 on this control. A technician confirms which one it is before any part is replaced.
- Connector pins backed out slightly so one phase makes poor contact
- Winding with insulation damage that confuses the preparation test
- Drive board memory that holds corrupted motor data
- Building supply sagging as other equipment starts
Safe checks before calling for service
- Take the machine off power. That is the maker's own step for clearing this code.
- Wait a moment, then try one start.
- Do not open the cabinet.
- Should E d 67 return, call us and give us the time.
How a technician diagnoses error code E d 67
- Read the code and note that it appears before any drum movement.
- Lock out the machine and check the motor harness plug at the drive.
- Test each motor winding for resistance and insulation.
- Measure supply voltage during power-up.
- Replace the motor or the drive board according to which test fails.
- Plug and winding checks mean opening the cabinet on 208 to 240 V equipment.
- Insulation testing a motor needs a proper tester and a disconnected drive.
- Telling a motor problem from a board problem takes several steps of elimination.
Technical reference
- Document
- Washer-Extractor Programming CHM1792C_SVG, Part No. F8641001ENR4, Error Codes Table 29 (pp. 100-107)
- Maker documentation
- UniMac owner support
- Edition
- Part No. F8641001ENR4, January 2020
- Models / control
- CHM1792C family washer-extractor (QN models, 20-100 lb) front-end control
- Section
- Error Codes, Table 29, pp. 100-108 (PDF pages equal printed pages)
- Checked
- October 2026
We use the maker's document to read the code and do not reproduce it. Always confirm the complete model and control before applying these steps.
Related UniMac industrial laundry error codes
Is E d 67 the same as a locked rotor?
No. A locked rotor is about the drum not turning after it was told to. E d 67 happens earlier, in the preparation.
Could the load affect it?
Not directly. It occurs before the load is moved.
Is it safe to try again?
One start is fine. After that, repeated tries add nothing.
Need help with UniMac error code E d 67?
A technician confirms the cause on site and gives you the price in writing before any work starts.