DMW-22-TDL SERVICE MANUAL
Confidential and proprietary information of Meister Cook, LLC. Not to be reproduced or used in any manner other than
with the express written permission of Meister Cook, LLC.
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P a g e
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Check heater cable for damage or
loose pins
-
Test with new TC Board
-
Test for proper heater current draw
from power supply
-
Test with new UI Board
-
Test with new thermocouples
-
Restore firmware defaults
Zone not reaching temperature
/ “FLT! 2222”
-
Displayed temperature is
holding relatively steady
below 165F
-
Cycle power and see if problem
reappears within 30 minutes
-
Verify system is at room temperature
or warmer
-
Verify no major heat sources are near
the right side of the system
-
Check if system works if plugged into
another outlet or circuit
-
Check system for low power draw
during warm-up
-
Check heater resistance
o
If other heater functions, connect
to each heater circuit and check for
normal power draw
-
Check blowers for sufficient rotation
-
Check blower wheel for proper vane
orientation
-
Check thermocouples for:
o
Contamination on tips
o
Damage to wire
o
Short circuit
o
Crossed connections
o
Reverse polarity
-
Check heaters for:
o
Crossed connections
o
High resistance
-
Check heater cable for damage or
loose pins
-
Test for proper heater current draw
from power supply
-
Test with new TC Board
-
Test with new thermocouples
Temperature continues to rise
significantly above setpoint /
“FLT! 3333”
-
Verify temperature setpoints for
affected menu item(s)
-
Verify both left and right products
have the same temperature setpoint
-
Check if system works if plugged into
another outlet or circuit
If problem shows up at startup:
-
Check thermocouple for loose
connection
-
Check thermocouple for damage to
wire
-
Check ribbon cable between UI and TC
Boards
-
Test with new TC Board
-
Test with new UI Board
If problem shows up during operation:
-
Check system for high power draw
during warm-up
o
Test each functioning heater in
both heater circuits and check for
normal power draw
-
Check heaters for:
o
Crossed connections
