Service manual

Troubleshooting Chart
PROBLEM POSSIBLE CAUSES REMEDY (Check/Adjust/Replace)
Filling
Not filling Water supply valve shut Water supply valve
Door switch faulty Door switch
Solenoid valve faulty Solenoid valve
Rinse lines blocked Rinse pump, solenoid valve filter
Pressure switch faulty Pressure switch
Won't stop filling Solenoid valve faulty Solenoid valve
Pressure switch set too high/faulty Pressure switch
Pressure bell blocked, hose broken Pressure bell, hose, hose connections
Filling during Pressure switch refill level too high Pressure switch
wash cycle Upstand does not fit properly Drain upstand
Heating
Rinse not heating Over-temp thermostat tripped Over-temp thermostat, rinse element
Rinse thermostat settings or fault Rinse thermostat
Rinse element faulty Rinse element
Overheating Thermostat adjustment Thermostat
Thermostat probe out of pocket Insert & secure probe
Wash water cold Wash thermostat set too low Wash thermostat
Wash element faulty Wash element
Machine not rinsing Solenoid valve, water supply
Rinsing but not hot Thermostats & elements, water supply
Rinsing cycle too short Timer
Cycle start
Does not start Not up to temperature Give machine reasonable time initially
Rinse thermostat faulty Rinse thermostat
Door switch faulty Door switch
Cycle finish
Rinse doesn’t stop Solenoid jammed open Solenoid valve
Timer stuck Timer
Pressure switch faulty Pressure switch
Wash continues Timer jammed Timer / Timer motors
Cycle time
Cycle too long Timer faulty Timer / Timer motors
Cycles selection (for multi-cycle machines)
Time not changed Selector switch faulty Selector switch
Advance timer motor faulty 6 sec advance timer motor
Timer micro switches faulty T4 or T5 timer micro switches
Delays
At start or Rinse element faulty Rinse element
between Water supply cold Supply hot water
cycles Water supply pressure excessive Restrict supply pressure
Rinse cycle too long Timer
Service Manual XP-2
12
Revision 1C