DIHR HT 12 - Page 27

USA
page 57
B5. BOILER OVERHEATING:
Cause:
The water temperature in the boiler exceeded 221°F (105°C).
Checks:
1.
The boiler pressure-switch failed. Replace if needed.
Before replacing the pressure-switch, drain the boiler completely.
2. Check the sensor integrity. Replace if needed.
3. Check the boiler coil-switch protection.
4. Check the boiler safety thermostat. Should the thermostat be overheated, press the reset button to check its effi ciency.
Replace if needed.
5. Circuit board failure. Change the circuit board.
b5
BOILER OVERHEATING
E2. TANK PROBE FAIL.:
Cause:
The circuit board does not detect the wash-tank sensor.
Checks:
1. Check the electrical connection between circuit board and sensor.
2. Check if the sensor works properly.
3. Check that the sensor did not overheat.
E2
TANK PROBE FAIL.
E3. TANK HEATING ALARM:
Cause:
The factory-set wash-tank temperature was not achieved in the maximum foreseen 60 min.
time limit.
Checks:
1. If the tank heating element heats properly.
Check the integrity of the electrical heating element.
Check the electrical connection.
Check the tank coil-switch (remote control switch) protection.
2. Circuit board failure. Change the circuit board.
E3
TANK HEATING ALARM
E5. TANK OVERHEATING:
Cause:
The wash-tank temperature exceeded 194°F (90°C).
Checks:
1. Check the sensor integrity. Replace if needed.
2. Check the wash-tank coil-switch protection.
3. Circuit board failure. Change the circuit board.
E5
TANK OVERHEATING
E1. RIEMPIMENTO VASCA:
WATER LOAD FAILED:
Cause:
The machine wash-tank was not fi
lled in the maximum foreseen 15 min. time limit.
Checks:
1. No water supply to the machine. Open all water supply valves.
2. Check the right functioning of the solenoid valve.
Solenoid valve fi lter clogged. Clean the fi lter.
Solenoid valve Y5 failure. Change the solenoid valve.
3. Check the free rotation of the rinse pump. Should the impeller be blocked, rotate the motor shaft manually, by a screw-
driver (see image 27).
4. Rinse pump failure. Change the pump.
5. The fi lling of the wash-tank does not stop. Check the tank pressure switch.
6. The rinse nozzles are obstructed. Clean the rinse nozzles.
7. Circuit board failure. Change the circuit board.
E1
WATER LOAD FAILED