Detroit Diesel DDEC VI Application And Installation page 269

5.11.3 SINGLE–SPEED FAN (FAN TYPE 7)
The single-speed fan control (type 7) uses one digital output (Fan Control #1) to drive a
single-speed fan. This fan type can be used if the current is less than 2.0 A. Fan Control #1 is an
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 five 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 is 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 specific connection from DDEC VI to the fan. See Figure
5-14. Compatible fans may be obtained from several vendors.
Figure 5-14 Single-speed Fan – Fan Type 7
All information subject to change without notice. (Rev. 01/07)
7SA827 0701 Copyright © 2007 DETROIT DIESEL CORPORATION
DDEC VI ELECTRONIC CONTROLS APPLICATION AND INSTALLATION
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