ELECTRONIC MODULE CONNECTION CHECK
LED & BUTTON TEST
1. Press and hold LOCK, then press > DRYNESS so that both buttons are down at the same time.
1. Press and hold LOCK, then press > DRYNESS so that both buttons are down at the same time.
All LED’s should be on
2. Press ON/OFF button to turn LED’s off.
3. Press ON/OFF button and check all other buttons are working. Check that buzzer is sounding.
2. Press ON/OFF button to turn LED’s off.
3. Press ON/OFF button and check all other buttons are working. Check that buzzer is sounding.
DRUM ROTATION
& ELEMENT CHECK
1. Connect an amp meter or watt meter in the mains supply to ED55/56. Turn dryer on and set to REGULAR temperature, then press START/PAUSE button to start. Amp meter should read approx 8.5 amps OR watt meter should read 2000 watts.
Note 1: If dryer does not start, check the door switch adjustment. See “Other Fault Codes” under FAULT CODES.
Note 2: A fault on the circuit board will cause a fault code to be displayed on the Dryness LED’s about 12 secs after the initial pressing of the START/PAUSE button – overwriting the “NORMAL” display – see FAULT CODES.
1. Connect an amp meter or watt meter in the mains supply to ED55/56. Turn dryer on and set to REGULAR temperature, then press START/PAUSE button to start. Amp meter should read approx 8.5 amps OR watt meter should read 2000 watts.
Note 1: If dryer does not start, check the door switch adjustment. See “Other Fault Codes” under FAULT CODES.
Note 2: A fault on the circuit board will cause a fault code to be displayed on the Dryness LED’s about 12 secs after the initial pressing of the START/PAUSE button – overwriting the “NORMAL” display – see FAULT CODES.
2. Press START/PAUSE button twice.
• Dryer should stop and reverse direction.
• Amp meter should again read approx 8.5 amps OR watt meter should read 2000 watts.
3. Press START/PAUSE and set to LOW temp setting. Press START/PAUSE.
• Dryer should stop and reverse direction.
• Amp meter should again read approx 8.5 amps OR watt meter should read 2000 watts.
3. Press START/PAUSE and set to LOW temp setting. Press START/PAUSE.
4. Press START/PAUSE and set to Cold and run again. Meter should read approx 0.5 amps or 130
watts.
LED & BUTTON TEST
1. Press and hold LOCK, then press > DRYNESS so that both buttons are down at the same time.
- All LED’s should be on.
2. Press ON/OFF button to turn LED’s off.1. Press and hold LOCK, then press > DRYNESS so that both buttons are down at the same time.
- All LED’s should be on.
3. Press ON/OFF button and check all other buttons are working. Check that
buzzer is sounding.
DRUM ROTATION & ELEMENT CHECK
1. Connect an amp meter or watt meter in the mains supply to ED55/56. Turn dryer on and set to REGULAR temperature, then press START/PAUSE button to start. Amp meter should read approx 8.5 amps OR watt meter should read 2000 watts.
Note 1: If dryer does not start, check the door switch adjustment. See “Other Fault Codes” under FAULT CODES.
Note 2: A fault on the circuit board will cause a fault code to be displayed on the Dryness LED’s about 12 secs after the initial pressing of the START/PAUSE button – overwriting the “NORMAL” display – see FAULT CODES.
1. Connect an amp meter or watt meter in the mains supply to ED55/56. Turn dryer on and set to REGULAR temperature, then press START/PAUSE button to start. Amp meter should read approx 8.5 amps OR watt meter should read 2000 watts.
Note 1: If dryer does not start, check the door switch adjustment. See “Other Fault Codes” under FAULT CODES.
Note 2: A fault on the circuit board will cause a fault code to be displayed on the Dryness LED’s about 12 secs after the initial pressing of the START/PAUSE button – overwriting the “NORMAL” display – see FAULT CODES.
2. Press START/PAUSE button twice.
• Dryer should stop and reverse direction.
• Amp meter should again read approx 8.5 amps OR watt meter should read 2000 watts.
3. Press START/PAUSE and set to LOW temp setting. Press START/PAUSE.
• Dryer should stop and reverse direction.
• Amp meter should again read approx 8.5 amps OR watt meter should read 2000 watts.
3. Press START/PAUSE and set to LOW temp setting. Press START/PAUSE.
4. Press START/PAUSE and set to Cold and run again. Meter should read approx 0.5 amps or 130
watts.
EXHAUST SENSOR & DOOR SWITCH TEST
1. Start dryer running REGULAR or LOW TEMPERATURE mode; then press and hold LOCK; then press START/PAUSE button.
1. Start dryer running REGULAR or LOW TEMPERATURE mode; then press and hold LOCK; then press START/PAUSE button.
Note: This advances the drying cycle so that a shorted temperature
sensor can be detected. (See Fault Codes – Shorted Exhaust Sensors).
2. Press and hold LOCK; then press < DRYNESS. Release and press START/PAUSE.
2. Press and hold LOCK; then press < DRYNESS. Release and press START/PAUSE.
• If there is a fault with the exhaust sensor, the fault code will
be immediately displayed within 1 second with the beeper sounding (see fault
codes).
3. Open the door and the machine should pause. (The three delay LED’s will turn on with the door opened). ED56 only
3. Open the door and the machine should pause. (The three delay LED’s will turn on with the door opened). ED56 only
FAULT CODES
If a fault should develop in the temperature measurement system of
the ED55/56 control system, a fault code will be displayed on the front
panel. A fault code is distinguished
from normal display in that only a combination of the 4 dryness LED’s will be on
and with the beeper sounding on and off.
If a fault code should appear, first switch the dryer off at the wall socket or remove the plug. Switch on again; if fault re-occurs use the following codes to diagnose the fault.
NOTE: Pressing the POWER button will clear the fault code. The faults and their respective fault code that can be checked and serviced in the field are as follows
If a fault code should appear, first switch the dryer off at the wall socket or remove the plug. Switch on again; if fault re-occurs use the following codes to diagnose the fault.
NOTE: Pressing the POWER button will clear the fault code. The faults and their respective fault code that can be checked and serviced in the field are as follows
Faulty Exhaust Sensor – Code: 0101 pr 1001
Action: Unplug exhaust sensor.
Check resistance of sensor. (See Testing Exhaust Sensor). If faulty, replace.
NOTE: A shorted exhaust sensor can also be sensed by the Temperature Measurement System as a very low temperature reading. Remember the sensor decrease in resistance as the temperature decreases. To stop a fault code showing at very low temperatures (below 0degree), this fault code will not show until 5 minutes after the dryer has started. This allows the sensors time to be heated up by the exhaust air. up by the exhaust air.
Refer EXHAUST SENSOR AND DOOR SWITCH TEST to eliminate this delay.
Exhaust Sensor Shorted to Cabinet: Code: 1010
NOTE: A shorted exhaust sensor can also be sensed by the Temperature Measurement System as a very low temperature reading. Remember the sensor decrease in resistance as the temperature decreases. To stop a fault code showing at very low temperatures (below 0degree), this fault code will not show until 5 minutes after the dryer has started. This allows the sensors time to be heated up by the exhaust air. up by the exhaust air.
Refer EXHAUST SENSOR AND DOOR SWITCH TEST to eliminate this delay.
Exhaust Sensor Shorted to Cabinet: Code: 1010
Action:
• Unplug exhaust sensor. Check resistance between sensor wires and the dryer cabinet. There should be no connection between the wires and the cabinet.
• If there is a short, inspect the exhaust sensor harness to trace the cause of the short.
• Unplug exhaust sensor. Check resistance between sensor wires and the dryer cabinet. There should be no connection between the wires and the cabinet.
• If there is a short, inspect the exhaust sensor harness to trace the cause of the short.
Over Temperature: Code: 1101
Cause: If the exhaust air temperature is above 90oC a fault code is given. The dryer should not reach this temperature in normal operation.
Cause: If the exhaust air temperature is above 90oC a fault code is given. The dryer should not reach this temperature in normal operation.
Action: Check the lint filter and
exhaust duct for any blockage or restriction to the airflow.
Other Fault Codes
There are many other fault codes; the PCB assembly itself. The PCB assembly will have to be replaced in these cases.
Record the fault code displayed and return with the PCB assembly to Fisher & Paykel for repair.
There are many other fault codes; the PCB assembly itself. The PCB assembly will have to be replaced in these cases.
Record the fault code displayed and return with the PCB assembly to Fisher & Paykel for repair.
TESTING THE EXHAUST SENSOR
At normal room temperature (25degreeC) the resistance of the thermistor will be approx 2000 ohm and at 0degreeC 1640 ohms.
Description: The Exhaust Sensor consists of a device called a thermistor, which is mounted on a small piece of PCB attached to the wiring harness.
At normal room temperature (25degreeC) the resistance of the thermistor will be approx 2000 ohm and at 0degreeC 1640 ohms.
Description: The Exhaust Sensor consists of a device called a thermistor, which is mounted on a small piece of PCB attached to the wiring harness.
Use a multi meter to test the resistance of the sensor.
The thermistor is a device that changes its electrical resistance according to the temperature. The higher the temperature, the higher the resistance thermistor.
The thermistor is a device that changes its electrical resistance according to the temperature. The higher the temperature, the higher the resistance thermistor.
DOOR SWITCH ADJUSTMENT
The door switch should be adjusted so that the door has opened no more than 40 mm – 65 mm before the PAUSE mode is activated and the dryer stops.
Adjust door switch by removing hinge cover (two screws). Loosen two screws holding the switch. If the door switch is not activated the ED55/56 will sound a warning tone when the START/PAUSE button is pressed.
The door switch should be adjusted so that the door has opened no more than 40 mm – 65 mm before the PAUSE mode is activated and the dryer stops.
Adjust door switch by removing hinge cover (two screws). Loosen two screws holding the switch. If the door switch is not activated the ED55/56 will sound a warning tone when the START/PAUSE button is pressed.
BROWN OUT
If the mains voltage falls below a certain voltage, even for a short period of time, it is known as a brown out.
If the mains voltage falls below a certain voltage, even for a short period of time, it is known as a brown out.
If this mains voltage falls below this minimum voltage the
Electronic Control System will not be able to function correctly. The
Electronic Control System therefore is fitted with a circuit that will
automatically turn the dryer off.
The voltage at which this happens is between 165 – 170 volts.
During Brown Out the dryer will simply switch off. The dryer can be restarted by simply using the POWER button.
The voltage at which this happens is between 165 – 170 volts.
During Brown Out the dryer will simply switch off. The dryer can be restarted by simply using the POWER button.
TEMPERATURE MEASUREMENT
With the ED56 it is possible to display the temperatures the
exhaust and ambient sensors are measuring. The temperature of each sensor can
be displayed using the following procedure:
Start the dryer as per normal operation, i.e.
1. Press POWER button.
2. Press START/PAUSE button. Dryer will now be operating normally.
3. Press & hold LOCK then press < DRYNESS button at the same time.
Start the dryer as per normal operation, i.e.
1. Press POWER button.
2. Press START/PAUSE button. Dryer will now be operating normally.
3. Press & hold LOCK then press < DRYNESS button at the same time.
The display will now change to display the temperature of the
exhaust sensor. The temperature is displayed in c coded form.
4. Press < DRYNESS button again. The display will now show the temperature of
the ambient sensor, again this is in coded form
5. Press > DRYNESS button to change the display back to showing
the exhaust sensor temperature.
6. When either of the two dryness buttons are pressed either the
ambient or exhaust sensor temperature will be displayed.
7. Press POWER button to return to normal operation.
NOTE: Throughout the temperature reading mode the dryer will continue as normal.
7. Press POWER button to return to normal operation.
NOTE: Throughout the temperature reading mode the dryer will continue as normal.
READING DISPLAYED TEMPERATURE
The temperature is displayed using the binary code on 8 LED’s on
the control panel, i.e. from 1 hr through to Crease Guard.
Each LED represents a certain temperature. For each LED that is turned on its corresponding temperature is added together to give a total. This total is the temperature (in degrees C) that the sensor is reading.
The temperatures corresponding to each LED is as follows:
Each LED represents a certain temperature. For each LED that is turned on its corresponding temperature is added together to give a total. This total is the temperature (in degrees C) that the sensor is reading.
The temperatures corresponding to each LED is as follows:
Add the temperatures corresponding to each LED which is on 1 + 2 + 8 = 11: Hence the temperature is
11
degrees C.
Example Two: After selecting the temperature-measuring mode the following is
displayed:
Add the temperatures corresponding to each LED which is on
0.5 + 2 + 4 + 8 + 16 =30.5. Hence the temperature is 30.5 degrees C
NOTE: In the temperature reading mode, the temperatures are updated approximately every ½ second.
0.5 + 2 + 4 + 8 + 16 =30.5. Hence the temperature is 30.5 degrees C
NOTE: In the temperature reading mode, the temperatures are updated approximately every ½ second.
The final drying temperature of the previous drying cycle will
remain latched in memory until the START/PAUSE of the next drying cycle is
pressed. This applies to the ED56 only.
Common drying problems
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