Troubleshooting guide (cont’d) – SeaLand TankMaster 4 User Manual
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TROUbLESHOOTING GUIDE (cont’d)
Symptom 4: Discharge pump continually runs while in the auto mode.
Step A
1. Confirm the low-level float is not adjusted too low within the holding tank. This float should be at
least 1.5" above the bottom of the holding tank. This assures the float will be positioned above
both the residual fluid level and the dip tube opening. If not positioned correctly, the low float will
never drop down and trigger the discharge pump to shut off.
u If the float adjustment is incorrect, adjust the float accordingly.
u If the float adjustment is correct, go to step B.
Step b
. Remove the TankMaster
™
4 faceplate.
2. Confirm the wires are attached to the keylock switch in the following way:
• Red wires: terminal and terminal 8 on switch
• Brown wire: terminal 2 on switch
• Blue wire: terminal 7 on switch
u If the wiring is incorrect, reattach the lead wires to the correct terminals.
u If the wiring is correct, go to step B.
Step C
. Place the (-) voltmeter lead on pin 9 and (+) voltmeter lead on pin 2 of the terminal block.
2. Turn the key to the off position.
u If reading is equal to the control voltage, check for the following:
• Short between red and brown lead wires attached to switch
• Keylock switch may be defective
u If reading is not equal to the control voltage, check for the following:
• Make sure the float switches are not shorted or stuck.
Symptom 5: “Discharge Pump On” light will not illuminate when pump is running.
Step A
. Remove the TankMaster 4 faceplate.
2. Confirm the LED leads are still attached to the circuit board.
3. Confirm the LED leads are soldered in correctly:
• White lead wire into square-plated hole
• Red lead wire into round-plated hole
4. Replace the control panel if the LED is defective.
Symptom 6: “Check Seacock” light will not illuminate when seacock is closed.
Step A
. Remove the TankMaster 4 faceplate.
2. Confirm the LED leads are still attached to the circuit board.
3. Confirm the LED leads are soldered in correctly:
• White lead wire into square-plated hole
• Red lead wire into round-plated hole
4. Replace the control panel if the LED is defective.