Winterhalter error codes

SOURCE: could you please tell me what error codes 21 and 6

error 6 relates to a blocked drain pump. if the drain pump is working ok check if the tank level sensor is operating or if the air chamber in the wash tank is blocked.
error 21 relates to the drain pump being activated. normally related to error 6.
also check water inlet solenoid valve is working correctly. ie not blocked or passing.
all parts of the machine can be activated manually by entering service mode.
when machine is off press service button or switch on main pcb.
p00 appears. press and hold main wash button. --- appears. using the long and short wash buttons you can scroll through parts of the machine. displayed as a01 a02 a03 etc.drain pump is a12 solenoid valve is a13. these are activated by pressing the button. when activating the drain pump the display will count down. this number is the water level in the wash tank. if it's counting down the level sensor is ok.
hope this helps
jarv

SOURCE: winterhalter gs502 dishwasher-error code 15?What's

The float switch/level sensor in the rinse boiler has not activated. This could be a faulty solenoid not letting the water in(assuming the isolating valve is turned on), or a faulty float switch/level sensor. This would result in water overflowing through the rinse arms and the overflow in the rear of the wash tank.