Midmark M11 - Door Motor System; To Test the Door Motor

English-101
004-1032-00
TP210 Rev. A
© 2012 Midmark Corp. | 60 Vista Drive Versailles, OH 45380 USA | 1-800-643-6275 | 1-937-526-3662 |
[Revised: 8/10/15]
Door Motor System
Location / Function / Testing
At the end of the Sterilization Mode...
When pressure in the chamber drops to 0.7 psi (5 kPa), the PC board bypasses the
motor switch and supplies line voltage to the door motor.
e door motor rotates the cam causing the motor switch to close. Now, the cur-
rent to the door motor ows thru the motor switch. As the cam
rotates, the connector rod causes the latch lever to open the door.
When the cam reaches the bottom of its travel, the motor reverses
direction. When the cam reaches its starting position, the motor switch opens,
stopping the current ow to the door motor.
Motor Switch
Door Motor
Cam
Connector
Rod
Latch Lever
To test the door motor...
A) Disconnect two wires from door motor.
B) Set meter to ‘20K Ω’
C) Place meter probes on door motor terminals.
Meter Reading
(Acceptable Ranges)
Required Action
115V models: 6620
Ω (+/- 20%)
Perform PC Board Relay Test
230V models: 12,200
Ω (+/- 20%)
Meter Reading Required Action
any reading out of the
acceptable range
Replace door motor
Motor Switch
Door Motor
Cam
Connector
Rod
Latch Lever
Before V1731235
V1731235 and after
midmark.com
Style A