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FEATURES
5.11.2
SINGLE–SPEED FAN (FAN TYPE 4)
This fan type must be used if the current exceeds 2A. The two outputs (Fan Control #1 and Fan
Control #2) must be wired together. The single-speed fan control uses two digital outputs to
drive a single-speed fan. Fan Control #1 and #2 are open circuit to turn the fan ON. The fan
will remain ON for a minimum of 30 seconds. The fan output will not be enabled until
fi
ve
seconds after the engine has started.
NOTE:
Fan output circuits are designed to sink no more than 2.0 A (DC) current.
Fan Control #1 and #2 are open circuit when at least one of the following conditions occur:
□
Coolant temperature above factory set levels
□
Intake manifold temperature above factory set levels
□
Air conditioner is active (OEM supplied A/C switch is opened) – optional
□
Coolant or intake manifold air temperature sensor fails
□
Engine Brake is active at high level (optional)
□
Fan Control Override Switch is grounded (ON)
□
PTO is enabled and active – optional
Single-Speed Fan Installation
This section provides a schematic of the speci
fi
c connection from DDEC VI to the fan. See
Figure 5-13. Compatible fans may be obtained from several vendors.
Figure 5-13
Single-speed Fan – Fan Type 4
5-54
All information subject to change without notice.
(Rev. 01/07)
7SA827 0701
Copyright © 2007 DETROIT DIESEL CORPORATION