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
In addition to the fault codes, current measurement devices can also be helpful. A power meter, such
as a “Kill-a-Watt”, can measure power draw. Each heater should draw 400W during preheat, and the
power draw should gradually be reduced as the setpoint is approached. A typical power draw of
approximately 800W at startup is typical. Power draws significantly lower may indicate an open
heater circuit. Power draws significantly higher may indicate a short circuit or a faulty power supply.
When trying to isolate a faulty heater or power supply, it may be helpful to test power draw with
each heater connected one at a time.
Finally, a heat gun can also be helpful in determining if the temperature measurement circuit is
working properly. By simply directing a stream of hot air of a known temperature at the
thermocouple, a corresponding rise in temperature should occur at the UI.
6.
TROUBLESHOOTING
Refer to the matrix below for a step-by-step approach to navigating through various reported
symptoms. Please note that it is possible not all failure symptoms have been documented. As
symptoms appear, this guide will be updated. Also note, if the recommended steps do not resolve
the problem, escalate to the next level. Finally, be sure to document all symptoms (reported and
unreported) all corrective actions taken, and all parts consumed.
Reported Symptom
Phone Troubleshooting
On-Site Troubleshooting
System is dead
-
No display
-
No LEDs
-
No light on switch
-
No heat
-
Verify system is turned on
-
Verify system is plugged in
-
Check if power cord or plug is
damaged
-
Check if system works if plugged into
another outlet or circuit
-
Check if store circuit breaker is tripped
-
Does the power switch light up when
depressed? Yes indicates a problem
downstream. No indicates that the
unit isn’t getting power. Check the
power cord & switch.
-
Are the power cables connected?
-
Check for wiring harness or connector
defects
-
Test with new power supply
-
Test with new UI Board
Temperature not high
enough/too high
-
System has been running for
at least 1 hour
-
Displayed temperature is
holding relatively steady
between 165F and 250F
-
Verify pans are installed
-
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
-
Check system for abnormal power
draw during warm-up
-
Check system for abnormal power
draw at steady-state
-
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
Heater resistance
