Dexter Laundry T900 Parts & Service Manual page 58

Fault Description
COMM
I2C Bus Error Condition
ERROR 1
COMM
Wrong
ERROR 2
Washer
Size Jumper
Configuration
COMM Washer Size
ERROR 3 or Type
Changed
58
Part # 8533-081-001 1/18
Customer Action
Washer controller communication error on the I2C
bus. Both the main slave micro and the master micro
can be in this error state. The slave micro error
is recoverable at any time, if I2C communication
resumes. The master micro error is permanent.
Delay The main slave starts displaying this error after 6
seconds of no (valid) I2C activity. The master micro
goes into this permanent error state after 8 seconds
of no (valid) I2C activity
Action Stop the washer and turn off all outputs.
Solution Check VFD fault light before turning off power. Try the
data cable first. Move around cable and remove any
side loading tension from data cable connector ends.
Check connection P23 to P15. Turn power back on to
the washer. If the problem returns, replace the PCB
washer controller.
Condition Invalid washer size jumper (harness) configuration.
Delay Immediate (after the wrong size jumper configuration
is read). Washer size/type inputs are read only at
power up, before starting a cycle, once every 24
hours, and in factory test mode.
Action Stop the washer.
Solution Check VFD fault light before turning off power. If the
controller was installed in a different size machine
before being installed in this machine, a problem
can occur. If someone has been doing repairs on the
washer, check for the correct size drive. It can also be
caused by pressure switch harness. Check to ensure
the correct harness in installed. The control can be
reset by holding program button on controller during
startup (soft reset). Check orange wire at Molex
connector on controller coming from pressure switch
or replace pressure switch harness.
Condition The washer size or washer type configuration has
changed.
Delay Immediate (after the size jumper configuration is
read). Washer size/type inputs are read only at power
up, before starting a cycle, once every 24 hours, and
in factory test mode.
Action Stop the washer.
Solution Check VFD fault light before turning off power. Check
to ensure all the harnesses are properly connected
to the controller. Check to ensure the VFD drive
horsepower is proper for this size of washer. The
control can be reset by holding program button on
controller during startup (soft reset). Check orange
wires at Molex connector on controller coming from
pressure switch.