Troubleshooting can be carried out in whole or in part using these instructions. It is important that you only carry out troubleshooting where you have sufficient knowledge and experience, especially when troubleshooting where the unit is live. Acetec accepts no responsibility for personal injury or damage to property during troubleshooting in accordance with these instructions.
Alarm 6 Rotor alarm, Flashing 6 on the control panel
Heat exchanger does not rotate, NOTE Heat exchanger (rotor) only rotates when there is a heating requirement
Switch off power supply to unit
Open the unit hatch and visually check the drive belt and rotor motor. On the rotor motor there is a pulley, try to rotate it by hand to make sure it is not completely locked, there is a small resistance but it should be possible to rotate it without problems. If no error can be detected, follow the instructions below for troubleshooting
Carry out test with unit door open, take care with water battery and low outside temperature
- Switch on the power supply to the unit.
- Set parameters 21 and 31 via the control panel according to the instructions below:
- Press and hold buttons 1 and 3 for approximately 2 seconds until the number 1 appears on the panel.
- Press button 3 until the number 21 appears on the panel.
- Hold down button 1 and simultaneously press button 3 until the number 30 appears on the panel, then release button 1.
- Press button 3 until the number 31 appears on the panel.
- Hold down button 1 and simultaneously press button 3 once so that Of appears on the panel.
- Then press button 3 several times until the digit window goes out completely
We have now increased the temperature setting to 30 degrees and turned off the residual heat battery.
This is to ensure that heat exchangers receive a start signal from the control equipment.
NOTE! When testing and troubleshooting alarm 6, an alarm will sound within 30 seconds if the fault persists.
Therefore, it may be necessary to acknowledge alarms several times during troubleshooting by interrupting the power supply or pressing the acknowledgement button on the circuit board.
If the rotor motor starts:
Check whether the drive belt slips on the heat exchanger or rotor motor pulley by braking the rotor slightly by hand. The rotor can be held in place if you hold it too tightly, but it should start immediately when you release the pressure.
Disconnect the power supply to the unit
Is the pulley fixed to the rotor motor shaft, the pulley stop screw should be firmly screwed to the flat part of the motor shaft.
A round magnet is screwed onto the heat exchanger. This sends pulses to the control equipment when it passes the rotation guard, which is a grey-white round plastic sensor. Check that the distance between the magnet and the sensor is no more than 15 mm.
Check the rotation switch cables (white), these are connected to terminals 30 - 31 on the circuit board
Disconnect the rotation switch cables by pressing the orange button and disconnect the cables from terminals 30 and 31, check the scaling which should be approx. 7 - 10mm, wrap together, press the orange button and reassemble the cable, release the orange button to lock the cable
If the rotor motor does not start:
Disconnect the power supply to the unit
Remove the drive belt from the rotor motor pulley.
Turn the pulley by hand, it should be a bit slow but it should be possible to turn by hand
If the pulley is stuck or very difficult to turn, the rotor motor is broken.
Open the rotor motor's electrical contacts (2 cross screws in the contact cover).
Check the cables in both electrical connectors of the rotor motor to ensure that no cable has come loose.
Apply voltage to the unit
Check voltage (230V) between terminals A and B in the socket closest to the rotor motor.
Switch off the power to the unit
Check the cables on circuit board terminals 22, 23 and 24 by pressing the orange button, check the scaling approx. 7-10 mm, twist together, press the orange button, reinstall the cable and release the orange button to lock the cable.
If the rotor motor is weak but can be started by turning the heat exchanger:
Switch off the power to the unit
NOTE! When disconnecting the capacitor cables, be careful not to touch the cable ends, connect the capacitor cables first to discharge the capacitor before touching these cable ends
Contact with an uncharged capacitor normally poses no danger, but discomfort may be experienced.
Check the capacitor cables on terminals 20 and 21 by pressing the orange button, check the scaling approx. 7-10 mm, twist together, press the orange button, reattach the cable and release the orange button to lock the cable.
The ohm value of a capacitor can also be checked by measuring the ohms; the value is indicated on the capacitor.
Do not forget to reset parameter 21 (temperature setting) and to set parameter 31 (reheating coil) to the On position as previously instructed on page 4.