Code E118 Master Control Relay K4 Welded

As stated before, remove the handle assembly from the drive unit, and inspect for shorting wire's inside the handle stem where they pivot by the switches, and also inspect the motor/brake cables where they go down through to the motor/brake.
Also check the K4 relay its the little black one between the horn and motor controller. It should have a diagram on the side of it to show you what each terminal is.
Check everything on the K4 circuit, pump contact, brake, lower sol valve, horn

Also code E115 is not in the manual,
E115 Contactor Off, Welded or Missing, or Faulty Power Amp
Description - Controller could not close contactor (contactor off), contactor welded, or contactor missing.