All alarms can be set to levels A, B, and C. For example, alarm 7A is the same as alarm 7B.
There are two authorisation codes – 6374 (basic) and 8990 (advanced).
If you get stuck at any stage, please do not hesitate to contact us either by email at support@acetec.se or by telephone on 010-2880110, option 2.
This text is also available as a PDF below. Instructions for test mode and control at low outdoor temperatures can be found at the bottom of the page.
Communication error
Alarm 1 – Interruption in communication between device and control panel.
Check the cable and connection (connectors) between the control panel and the circuit board.
Check the insulation of the cable on terminals 49–52 and re-insulate if necessary.
Check the connection in the display.
Alarm 2 – Network, TCP/IP
Activate the network by connecting the network cable – Activate the network function via – Settings – Enter 8990 – Network – Parameter 5200 – Troubleshoot your network if necessary.
Alarm 3 – Internet connection
Troubleshoot your network/router.
Alarm 4 – Cloud service
Restart your unit.
Troubleshoot your network/router.
Visit Evocloud for operational information.
Fan
Alarm 5 – Fault in supply air fan
Switch off the power supply to the unit and wait at least 2 minutes.
Open the unit hatch.
Turn the fan wheel by hand; it should rotate easily without making any noise.
Check for bearing faults or whether the fan wheel is catching on the inlet cone.
Inspect circuit boards for damage, corrosion or moisture/burn damage.
Open both fan connectors (2 Phillips screws in the connector cover) and check that the cables are securely attached.
Switch on power supply to unit
Activate Test Mode and run the supply air fan.
Measure the contact closest to the fan between terminals A and B, where there should be 230V AC voltage.
and between terminals C and D there should be between 2 and 10V. NOTE! DC voltage.
Also check that there is contact between E and terminal 13 on the circuit board.
Switch off power supply to unit
Check cables on terminals 11 to 15 on the circuit board by pressing the orange button, check the stripping approx. 7-10 mm, twist together, press the orange button, reattach the cable and release the orange button to lock the cable.
Alarm 6 – Exhaust fan fault
Switch off the power supply to the unit and wait at least 2 minutes.
Open the unit hatch.
Turn the fan wheel by hand; it should rotate easily without making any noise.
Check for bearing faults or whether the fan wheel is catching on the inlet cone.
Inspect circuit boards for damage, corrosion or moisture/burn damage.
Open both fan connectors (2 Phillips screws in the connector cover) and check that the cables are securely attached.
Switch on power supply to unit
Activate Test Mode and run the exhaust fan.
Measure the contact closest to the fan between terminals A and B, where there should be 230V AC voltage.
and between terminals C and D there should be between 2 and 10V. NOTE! DC voltage.
Also check that there is contact between E and terminal 32 on the circuit board.
Switch off power supply to unit
Check cables on terminals 28 to 32 on the circuit board by pressing the orange button, check the stripping approx. 7-10 mm, twist together, press the orange button, reattach the cable and release the orange button to lock the cable.
Heat exchanger
Alarm 7 – Heat exchanger not rotating
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 cover and visually inspect the drive belt and rotor motor. If no fault can be detected, follow the instructions below.
Turn on the excitement.
Activate Test mode and set parameter 5717 to 100%
If the rotor motor starts:
Check whether the drive belt is slipping 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 stuck on the rotor 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 guard cables (white), which are connected to terminals 38 and 40 on the circuit board.
Loosen the rotation guard cables by pressing the orange button and disconnect the cables from terminals 38 and 40. Check that the scaling is approx. 7–10 mm, twist together, press the orange button and reattach 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 rotate without significant resistance, otherwise 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.
Connect the power supply to the unit.
Activate Test mode and set parameter 5717 to 100%
Check the voltage (230V) between terminals A and B in the socket closest to the rotor motor.
If the rotor motor is weak but can be started by turning the heat exchanger:
Switch off the power to the unit
Check the capacitor cables on terminals 21 and 22.
The value of the capacitor can be checked by measuring the farad, the value is stated on the capacitor.
Check cables on circuit board terminals 23, 24 and 25.
Temperature
Alarm 8 – The temperature of the water battery return pipe is below the value set in Parameter 246 (requires accessory)
Inspect the return line.
Check Parameter 246.
Check the position and function of the sensor.
Check the pump and actuator function.
Check the water temperature entering the battery.
Alarm 9 – Supply air temperature is below the set value in parameter 264
Check that parameter 240 has the correct configuration – default = Int. El
Check parameter 264.
Is the unit correctly adjusted/have the filters been replaced?
Check outdoor and exhaust vents – they should be clear.
If low exhaust air temperatures – perform Low Temperature Check.
About the A70T – Ensure that the base flow is not taken through the cooker hood.
Alarm 10 – Exhaust air temperature is below the set value in parameter 273
Ensure that the ducts are correctly routed and insulated.
Check parameter 273.
Donor
Alarm 11 – Supply air temperature sensor
Ensure that the supply air sensor is positioned in the supply air duct.
Check the sensor cable for damage between the sensor and the unit.
Check connection and scaling on terminal 43–44. Press the orange button to disconnect the cable.
Check the scale, which should be 7-10 mm, and scale again if necessary.
The resistance value of the sensor at 20 degrees is 12.57 kohm.
Alarm 12 – Exhaust air temperature sensor
Ensure that the exhaust air sensor is positioned in the exhaust air duct.
Check the sensor cable for damage between the sensor and the unit.
Check the connection and scaling on terminals 41–42. Press the orange button to disconnect the cable.
Check the scale, which should be 7-10 mm, and scale again if necessary.
The resistance value of the sensor at 20 degrees is 12.57 kohm.
Alarm 13 – Outdoor air temperature sensor
Ensure that the outdoor air vent is positioned in the outdoor air duct.
Check the sensor cable for damage between the sensor and the unit.
Check the connection and scaling on terminals 45–46. Press the orange button to disconnect the cable.
Check the scale, which should be 7-10 mm, and adjust if necessary.
The resistance value of the sensor at 20 degrees is 12.57 kohm.
Alarm 14 – Temperature sensor Freeze guard (requires accessory)
Ensure that the freeze protection sensor is positioned on the return water pipe.
Check the sensor cable for damage between the sensor and the unit.
Check the connection and scaling on terminals 47–48. Press the orange button to disconnect the cable.
Check the scale, which should be 7-10 mm, and scale again if necessary.
The resistance value of the sensor at 20 degrees is 12.57 kohm.
Alarm 15 – Humidity sensor (requires accessory)
Check the sensor cable for damage between the sensor and the unit.
Check connection and scaling on terminals 53–56. Press the orange button to disconnect the cable.
Check the scale, which should be 7-10 mm, and scale again if necessary.
Other
Alarm 16 – Pressure value Supply air outside set range (requires accessory)
Check the set values for parameters 312, 314–317 and 931 (alarm delay).
Check the pressure sensor settings (inside the sensor)
Check the wiring and hose connections to the pressure sensor. Terminals 57-58-59.
Ensure that filters and airways are unobstructed.
Check that parameters 310/311 are set correctly and that any slave is correct.
Alarm 17 – Pressure value Exhaust air outside set range (requires accessory)
Check the set values for parameters 312, 314–317 and 933 (alarm delay).
Check the pressure sensor settings (inside the sensor)
Check wiring and hose connections to pressure sensors. Terminals 57-58-60.
Ensure that filters and airways are unobstructed.
Check that parameters 310/311 are set correctly and that any slave is correct.
Alarm 18 – Fire alarm broken
Check terminals 9–10 – should be closed during normal operation, open during fire.
Check external fire alarm centre.
Alarm 19 – Supply air temperature is above the set value or the outdoor air temperature + the set value in parameter 266
Check parameter 266 (MINIMUM 4 degrees recommended)
For internal electric battery, replace relay 1 (closest to network connection) – if nothing is connected to terminal 18, relay 2 can be used as a backup.
In the case of external afterheaters, check their function.
Terminal 35–36 is the (0–10 V) control signal for external afterheaters.
Alarm 20 – Alarm 21 – Alarm 22 – EvoCool (requires accessory)
If EcoCool is installed – contact Acetec, if not:
Ensure that parameter 250 is not set to Evocool.
Test mode EvoControl
Via a test mode, you can run the components in the unit separately.
To enter this mode, press Then .
You will now be prompted to enter a code. The code you should use is 123 321, followed by enter. If you have already entered the basic or advanced authorisation code, you can access this menu by pressing ”Advanced authorisation code”.”
You will now see parameters that can be tested, but some can only be viewed.
All parameters where + or – lights up can be changed.
For example, if you think there is something wrong with the supply air fan, press the down arrow to parameter 5711 fan speed supply air, where it says the standard is 0 %.
You can now set the value between 20–100% using the plus sign and then press save to start the fan. You can also test the other parameters in exactly the same way. To get to 100% more quickly, you can hold down the plus sign. To end the test, simply press the back button.
Control at low outdoor temperatures
Perform these checks in the event of operational problems in cold weather. Blows cold air – rotor problems, etc. This test provides useful information, so take the time needed to perform it.
Note all fan settings. Do they appear normal?
Run the unit in normal mode, which is what the customer normally uses (comfort).
Switch off the residual heat battery.
Set maximum temperature in user menu
Let the unit run for at least 15 minutes, time it, no less than 15 minutes.
During the waiting period, ensure that all sensors are correctly mounted on the top-connected units.
Note the supply air, exhaust air and outdoor air temperatures.
Calculate efficiency:
The efficiency must be at least 65–70% for A70T and A50S.
Other units approx. 75% or more
If the efficiency is lower, e.g. 50-60%, there is an imbalance in the air flows.
May be incorrectly adjusted, dirty filters (exhaust air), exhaust air grille (ice, snow)
Check electric battery
First, note the supply air temperature.
Turn the electric battery back on and wait at least 5 minutes, time it, not less.
Note the supply air temperature again when it stops rising, but wait at least 5 minutes.
The temperature increase should be 8–12 degrees for all units except A170, A230, and A250, which have a lower temperature increase of 4–5 degrees.
Check insulation
Exhaust air:
Read the exhaust air temperature
If the temperature in the house is 20 degrees and the exhaust air sensor shows 15 degrees, we lose 5 degrees on the way to the unit.
Efficiency levels may still be acceptable, but we will have a lower supply air temperature.
due to lower exhaust air temperature where we extract the heat.
Supply air:
Read the supply air temperature
If the supply air sensor shows 20 degrees and the temperature in the supply air diffuser is 15 degrees, we lose 5 degrees along the way and the air feels cold.
You always lose 2 or maybe 3 degrees along the way regardless, but with poor insulation, you lose more.