Detroit Diesel DDEC VI Application And Installation page 276

FEATURES
5.11.5 TWO-SPEED FAN
This configuration uses two digital outputs, Fan Control #1 and Fan Control #2, to drive a
two-speed fan. When Fan Control #1 output is open, the fan operates in low-speed mode. When
Fan Control #1 and Fan Control #2 are both open, the fan operates in high-speed mode.
NOTE:
Fan output circuits are designed to sink no more than 2.0 A (DC) current.
Fan Control #1 is an open circuit when at least one of the following conditions occur:
□ Coolant temperature above factory set levels
□ Intake manifold air temperature above factory set levels
Fan control #2 is an open circuit when one of the following conditions occur:
□ Coolant temperature above factory set levels
□ Intake manifold air temperature above factory set levels
□ Coolant, or intake manifold air temperature sensor fails
□ Air conditioner is active (OEM supplied A/C switch is opened) – optional
□ Engine Brake level is active at high level
□ Fan control override switch is enabled
□ PTO enabled and active – optional
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All information subject to change without notice. (Rev. 01/07)
7SA827 0701 Copyright © 2007 DETROIT DIESEL CORPORATION