SeaLand TankMaster 4 - Manual (Page 9)

9
TROUbLESHOOTING GUIDE (cont’d)
u If reading is equal to the control voltage, check for the following:
• Incorrect switch wiring or bad connections – 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 reading is still equal to the control voltage, keylock switch is defective.
u If reading is not equal to the control voltage:
• Defective circuit board - internal relay K or transistor Q2
Symptom 3: Discharge pump will not run in the auto or manual modes.
Step A
. Check input voltage to system by placing (-) voltmeter lead on pin 9 and (+) voltmeter lead
on pin 0 of the terminal block.
u If voltage is present, go to step B-.
u If there is no voltage present, check for the following:
• Defective DC power supply and/or defective electrical connections in main power line
• Blown fuse or tripped circuit breaker
Step b-1 (If your TankMaster DOES NOT use a seacock interlock switch.)
1. Confirm there is a jumper wire between pins 4 and 5 of the terminal block.
u If the jumper wire is present, check for continuity between pins 4 and 5 of the terminal block.
• If there is no continuity, check for the following:
• Loose connections within jumper wire – pins 4 and 5
u If there is continuity, go to step C.
u If this jumper wire is missing:
• Cut and strip a short piece of 8-gauge wire and secure it across pins 4 and 5.
Step b-2 (If your TankMaster DOES use a seacock interlock switch.)
. Place a jumper wire across pins 4 and 5 of the terminal block.
2. Place the (-) voltmeter lead on pin 9 and (+) voltmeter lead on pin 2 of the terminal block.
3. Turn the key to the manual position.
u If reading is equal to the control voltage, check for the following:
• Loose connections within seacock interlock switch wiring
• Defective seacock interlock switch
u If reading is not equal to the control voltage, go to step C.
Step C
. Follow all troubleshooting steps for Symptom  and Symptom 2 to determine if the keylock
switch is defective.
u If there are no problems found, check the following:
• Loose connections within discharge pump motor wiring
• Faulty discharge pump motor