Appliance Desk 4000 Service Manual page 12

The electronic module is defective
5.3
into tub with the unit pausing.
The pressure switch is defective
5.4
pressure switch as following.
5.4.1 When the drum is empty, the terminals PS-1 & PS-2 should be closed. And when the
water reaches to the set level, PS-1 & PS-2 will be open, and PS-1 & PS-3 will be closed.
If not, please replace a new one.
5.4.2 If the terminals PS-1 & PS-6 are closed with the tub empty, please replace a new pressure
switch.
How To Replace A New Electronic module?
 Power off and unplug the unit.
 Remove the rear panel by unscrewing three screws.
 The electronic module is located at the bottom right corner of the unit.
 Disassemble the electronic module by removing three screws and washers on the rear side of
the cabinet.
 Replace a new one and re-plug all the terminal plugs.
 Re-assemble the electronic module by following the reverse steps.
※Please note
the cap housing on the PCB. Not to pull the plug housing out by holding the
wire or harness.
6. Malfunction with the universal motor
If the motor will not rotate, or agitate in high speed, the error code
Poor wire connection to the motor:
6.1
the wiring to the motor (see figure below).
Poor wire connection to the electronic module:
6.2
module (see appendix 1).
The electronic module is defective:
6.3
controller can't sense the feedback from the motor, or the triac used to drive the motor was
broken down. Replace a new electronic module.
Water splashed on the electronic module:
6.4
electronic module, please dry it, and then test it again.
The motor is defective:
6.5
the following terminals. If the readings match near about, the motor is good. Otherwise
please replace a new one.
: Pressing the lock latch, and pull the plug housing out from
Have a cold test on the motor. Check for the resistance between
~ 11 ~
: Please replace a new electronic module, if water fills
: Check for the continuity between the terminals of
E5
Disassemble the rear cover of cabinet and check for
Check for the wiring to the electronic
If the drum will agitate in high speed, or the
Check for the water splashed on the
will be displayed on VFD.