Detroit Diesel DDEC VI Application And Installation page 272

FEATURES
5.11.4 DUAL FANS (FAN TYPE 6)
This configuration uses two digital outputs, Fan Control #1 and Fan Control #2, to drive two
separate single-speed fans. Fan Control #1 and Fan Control #2 are an open circuit to turn ON
each fan respectively. The fan remains on for 30 seconds. The fan outputs will not be enabled
until five seconds after the engine has started.
NOTE:
Fan output circuits are designed to sink no more than 2.0 A (DC) current.
The two fans are independent of one another and are controlled by different conditions. Both
fans will be activated when either the Fan Control Override is enabled or when the conditions are
met for Fan Engine Brake.
Fan Control #1 is an open circuit when at least one of the following conditions occur:
□ Intake manifold or coolant temperature above factory set levels
□ Intake manifold or coolant temperature sensor fails
□ Air conditioner is active (OEM supplied A/C switch is opened) – optional
□ Engine Brake level is active at high level – optional
□ Fan control override switch is grounded (ON)
□ PTO is enabled and active – optional
Fan control #2 is an open circuit when one of the following conditions occur:
□ Intake manifold or coolant temperature above DDC factory set levels
□ Intake manifold or coolant temperature sensor fails
□ Engine Brake level is active at high level – optional
□ Fan control override switch is grounded (ON)
□ PTO is enabled and active – optional
5-60
All information subject to change without notice. (Rev. 01/07)
7SA827 0701 Copyright © 2007 DETROIT DIESEL CORPORATION