SHOP MANUAL
Ch 6 page 48
ELECTRICAL SYSTEM
Fuel Heater
A/C compressor control
The fuel heater is enabled with a button on the switch panel.
The fuel heater is located inside the diesel filter on the engine. The
heater also has an integrated thermostat that will switch off at ap-
prox. 25°C to not overheat the diesel fluid.
The A/C clutch is controlled by the VCU2. There are two pressure transmitters connected in the A/C system
together with the A/C request from the climate control panel to control the clutch.
To enable clutch the following conditions must be met:
Request signal from control panel = ACTIVE
LP pressure between 0.3/0.4 to 19/22bar
HP pressure between 1.8/2.0 to 19/22bar
To extend compressor lifetime the minimum off time is set to 15 seconds.
Figure 26
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