M44D CONTROLLER SYMBOLS AND FUNCTIONS
1. Indicates compressor status:
Light on - Compressor cooling on
Light off - Compressor cooling off
Light flashing - Start-up delay in progress
2. Indicates defrost status:
Light on - Defrost in progress
Light flashing - Refrigerator in dripping mode
3. Indicates fan status:
Light on - Cabinet fan ON
Light off - Cabinet fan OFF
Light flashing - Start-up delay in progress after defrost.
4. Indicates internal clock is running.
Flashing slowly - Clock error (ie:clock chip not working).
Flashing rapidly - Clock battery is drained.
Cyclical Flashing for delays indication:
One flash, 2 seconds off - High temperature alarm delay (standard)
Two flashes, 2 seconds off - High temperature alarm delay in defrost and
post-defrost
Three flashes, 2 seconds off - High temperature alarm delay during restocking
Four flashes, 2 seconds off - High temperature alarm delay after power-up
5. Indicates the alarm status:
Light on - Alarm is on
Light off - Alarm is off
Light flashing - Alarm silenced or memorized
6. Indicates the lock status:
Light on - Unit locked
Light off - Unit unlocked
Light Flashing - Locking delayed
At the left side of the controller display are the following LED indicators:
2
1
3
6
4
5
If an alarm flashes (H.01...H.10) when a user scrolls through the alarm list, the flashing indicates that
the alarm has never been reviewed. After pressing the P key on an alarm and reviewing any of its data,
the alarm will be displayed solid afterwards to indicate that the alarm has been reviewed. If the alarm
is still ongoing at the time of its display, the data are displayed but the ongoing alarm will be flashing
all time. In the event of non-reviewed and/or still ongoing alarms, the electronic control displays the
message “HAC”, alternating it with the temperature reading.
An alarm can be deleted from the controller memory by holding the arrow-down button for more than
5 seconds while one of the alarm data is displayed. After alarm deletion, the controller displays three
dashes: ---. Similarly, the value of the “H.dL” parameter can be reset to 0 by holding the arrow-down
button for more than 5 seconds while the value is displayed. All recorded alarms can be deleted at
once, by holding the arrow down button in the controller regular display. After all alarms deletion, the
controller displays three dashes: ---.
The chart below (Figure 6) shows how to navigate through the controller to access alarm data.
ACCESSING AND RESETTING ALARMS DATA ON THE ELECTRONIC CONTROLLER CONT’D.
Controller typical
display when alarm(s)
are recorded.
Press and hold “P” button for
approximately 5 seconds
Press and hold “U” button for
approximately 2 seconds
Press and release “P” button
Alarm type
Alarm start year
Alarm start month
Alarm start day
Alarm duration (hrs)
Alarm duration (mins)
Peak alarm temperature
Alarm start hour
Alarm start minute
Previous
Alarm
Next
Alarm
Figure 6
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