McCONNEL MULTIDRIVEM380‐4&M420‐4
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The temperature can be adjusted by pressing the (Red) or (Blue) keys on the left
side of the panel. The temperature is selectable between 16°C and 28°C.
Adjusting the Blower Speeds
The air conditioning blowers have three speeds and are normally controlled automatically
by the temperature controller. The blowers can be adjusted manually by pressing the right
hand (Up) or (Down) keys.
The current blower speed is shown on the control panel as indicated by a segmented
display.
Manual Control
It is also possible to select the LO mode (maximum cold) and HI mode (maximum heat)
from the temperature keys (Red) or (Blue)
.
Checking the Outside Temperature
The outside temperature can be displayed for six seconds by momentarily pressing the
key.
Switching the System OFF
Pressing the key or, blower (Down) key below minimum fan
speed, turns the system OFF.
If the temperature sensors fail error codes will be displayed as follows:
E1 External temp sensor is cut off
E2 External temp sensor is short circuited
E3 Internal temp sensor is cut off
E4 Internal temp sensor is short circuited
E5 Mixed air temp sensor is cut off
E6 Mixed air temp sensor is short circuited
E9 Water valve feedback signal is open or short circuited to battery
EA Water valve feedback signal is open or short circuited to ground
NOTE - the ratio of outside fresh air against re-circulation of air is controlled by opening or
closing the roof vents above operator's seat. Close for maximum outside air, open for the
maximum re-circulation.
If the sensors fail temperature can
be manually changed by using the
buttons.
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