these 3 digit codes are pump controller errors

150 = capacitor volts are low after line contactor closes
capacitor volts are less than 85 percent in run mode
Possible Causes:
- Faulty Line Contactor
- Poor Power Cable connections on the Controller
- Faulty Power Fuse (F10)
- Loose or Open 2X1:1 connection (2X1:1 connector)
- Faulty Controller

151 = Capacitor volts are low before the line contactor closes
Capacitor volts are less than 85 percent on initial key switch on
Possible Causes:
- F1 or F3 Fuses Faulty
- Fault in path 2X1:1 - F3
- Fault in path 2X1:2 - X7:1 - S1
- Fault in path X7:2 - 6X4:1 - F1
- Faulty Current Limiter
- Short between pump motor armature circuit and frame
- Faulty Controller

180 = Voltage at terminal capacitor too low
voltage at 2X1:1 less than 14 volts
Possible Causes:
- Faulty F3 Fuse
- Fault in path 2X1:17 - 2X6:1 - 2K1
- Fault in path 2X6:2 - X7:1 - S1
- Contactor tips dirty
- Faulty Controller

First things i would check is to make sure all fuses are good, remove them and ohm them out, visually inspect them if the element is visible and make sure they are not burnt or melted. Secondly i would make sure the battery is fully charged and has no apparent cell problems. Check all cable connections from the contactor panel to the pump controller. Check the motor brushes and cable connections.
Lastly check all the mentioned connectors and make sure all the pins are fully inserted and locked, none should be pushed back or burned and make sure the connector locks in fully when connected.

Hope this helps