ECC Climate Unit - Operating Chart

How to read the chart:
Select the symbol corresponding to the particular setting at the top of the table. The column directly underneath shows the actual or possible settings of the various components shown at the left of the chart.

0-5' indicates the blower settings (the setting is steplessly variable in the automatic position).
"1" indicates "Open"/"On".

"0" indicates "Closed/Off".

"0/1" indicates either 0 or 1, depending on other selected settings or whether the blower is on automatic.







* If max. cooling is selected recirculation will be engaged to achieve faster cooling (although never in the defroster position)


Control module response to faults
If a fault is detected, the control module will ignore the incorrect signal and will select a preset value which will "make the best" of the situation.

If, for example, the servomotor potentiometer is faulty, the air mixing shutter will assume the position corresponding to the temperature selector.

If the servomotor does not operate due, for example, to seizure of the arm or loss of the motor supply, the motor will be switched out after 10 seconds and will be prevented from restarting until the ignition is next switched on. If the blower motor or servomotor is connected to the incorrect supply voltage, the unit in question will be switched out immediately.

In the event of a blower motor fault, starting of both the blower and compressor will be inhibited.