Dual Acting SST System Troubleshooting Guide
Contents
1. Dual Acting SST System Troubleshooting Guide STEP 1 Before proceeding with the tests below verify that each orange power wire is connected to a live positive power source and that the fuses are not blown Make sure that each black wire has a good connection to ground After this is complete conduct the tests below Conduct the following test by directly powering the shorter unused cable on the EIC Relay Module Operation Reaction Touch positive to Red and Blue Simultaneously Touch positive to Red and Yellow Simultaneously Touch positive to Green and Blue Simultaneously Starboard trim tab down Touch positive to Green and Yellow Simultaneously Starboard trim tab up Touch positive to Red Green and Blue Simultaneously Both trim tabs down Touch positive to Red Green and Yellow Simultaneously Both trim tabs up If both trim tabs operate properly when the above test is conducted then either the EIC Display or the EIC Wire Harness is at fault Ensure that both ends of the EIC Wire Harness are seated firmly in the plugs and that the EIC Display s orange wire has proper voltage If the above test is conducted and both trim tabs still do not work then perform the test below by removing the EIC Dual Pump Cable Y Harness from the EIC Relay Module Using a hot lead directly power the end of the Y Harness just removed from the EIC Relay Module four wires in the plug as shown below Operation Reaction Touch positive to Red and Blue S2. arness from the Port Dual Acting Relay Module Take the Port Dual Acting Relay Module and using a hot lead directly power the three color wire pigtail featuring a red heat shrink collar as shown below Operation Reaction Touch positive to Red and Blue Simultaneously Touch positive to Red and Yellow Simultaneously If port trim tab still will not move unplug the port Dual Acting Hydraulic Power Unit DAHPU Directly power the DAHPU plug as shown below Operation Reaction Touch positive to Red and Blue Simultaneously Touch positive to Green and Blue Simultaneously Port trim tab up If port trim tab is functional when the DAHPU is powered direct but not when powered through the Port Dual Acting Relay Module then the Port Dual Acting Relay Module is faulty If the trim tab still does not move then the port DAHPU or port actuators are faulty STEP 2B Troubleshooting for Starboard Dual Acting Relay Module and Starboard DAHPU Before proceeding with the tests below ensure that each orange power wire is connected to a live positive power source and that the fuses are not blown Make sure that each black wire has a good connection to ground After this is complete conduct the tests below Unplug the EIC Dual Pump Cable Y Harness from the Starboard Dual Acting Relay Module Take the Starboard Dual Acting Relay Module and using a hot lead directly power the three color wire pigtail featuring a green heat shrink collar as shown be
3. imultaneously Touch positive to Red and Yellow Simultaneously If both trim tabs operate as they should after conducting the above test then the EIC Relay Module is faulty If both trim tabs still do not work then one of the Dual Acting Relay Modules or DAHPUs is at fault IMPORTANT FOR BOATS KEPT IN SEAWATER To provide protection from electrolytic corrosion a zinc anode must be applied to each tab In the case of tabs installed on the boat as original equipment by the builder Bennett recommends that a bonding system be utilized for your particular model The SST system top portion of the actuator and the actuator shaft are electrically isolated from each other Therefore the trim plane and the upper part of the actuator must be individually protected or integrated into a bonding system Trim tabs and actuators should be painted with anti fouling paint to prevent fouling by marine growth Follow paint manufacturer s recommendations for proper priming and painting of stainless steel NOTE Do not paint under zincs this prevents electrical contact with trim tabs STEP 2A Troubleshooting for Port Dual Acting Relay Module and Port DAHPU Before proceeding with the tests below verify that each orange power wire is connected to a live positive power source and that the fuses are not blown Make sure that each black wire has a good connection to ground After this is complete conduct the tests below Unplug the EIC Dual Pump Cable Y H
4. low Operation Reaction Touch positive to Green and Blue Simultaneously Starboard trim tab down Touch positive to Green and Yellow Simultaneously Starboard trim tab up If starboard trim tab still will not move unplug the starboard DAHPU Directly power the DAHPU plug as shown below Operation Reaction Touch positive to Red and Blue Simultaneously Starboard trim tab down Touch positive to Green and Blue Simultaneously Starboard trim tab up If starboard trim tab is functional when the DAHPU is powered direct but not when powered through the Starboard Dual Acting Relay Module then the Starboard Dual Acting Relay Module is faulty If the trim tab still does not move then the starboard DAHPU or starboard actuators are faulty This system could contain up to five 5 fuses three 3 1 5 amp with two 2 10 amp or two 2 20 amp The boat builder could have replaced these fuses with breakers or used breakers and inline fuses Five 5 ground black wires two 2 DAHPUs two 2 Dual Acting Relay Modules and one 1 EIC Relay Module
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