To Next PageTo Next PageWhy is my Airwell AQH 20-75 making excessive noise?
Excessive noise in your Airwell Heat Pump can stem from several sources. Check the clamping brackets of the lines for vibration. If the thermostatic expansion valve emits a whistler, refill. Inspect the dehydrating filter and ensure the compressor’s locknuts are tightened. If the compressor is noisy with seized bearings, it will need to be replaced.
What to do if the HP alarm activates and stops my Airwell AQH 20-75?
If the HP alarm activates and stops your Airwell Heat Pump, it could be due to several reasons. Check the operation of the pressure switch and replace it if defective. Ensure the delivery valve is fully open; replace it if it’s faulty. If there are substances with condensable gases in the circuit, drain the circuit. Also, verify that the condenser fan is functioning correctly by checking its cables and motor; repair or replace if defective.
Why is my Airwell AQH 20-75 Heat Pump running but not cooling?
If your Airwell Heat Pump is running but not cooling, it could be due to an insufficient charge of refrigerant, in which case, you should refill it. Alternatively, the dehydrating filter might be clogged and needs replacement.
What causes a low oil level in the Airwell AQH 20-75 Heat Pump compressor?
A low oil level in your Airwell Heat Pump's compressor can be caused by one or more gas or oil leaks in the circuit; identify and remove these leaks. It can also be due to a mechanical failure of the compressor, or an anomaly of the oil heater of the compressor’s base. If the latter, check the electric circuit and the resistor of the heater of the motor base, and replace defective components.
What causes the LP alarm to activate and stop the Airwell AQH 20-75?
The activation of the LP alarm, which stops the Airwell Heat Pump, can be due to a gas leak (identify and remove the leak) or an insufficient charge of refrigerant (refill).
How to fix ice on the suction line of my Airwell AQH 20-75?
Ice forming on the suction line of your Airwell Heat Pump can be due to wrong calibration of overheating (increase overheating) or due to charge (check the charge).
What causes frosting of the liquid line in my Airwell AQH 20-75 Heat Pump?
Frosting on the liquid line of your Airwell Heat Pump can occur if the valve of the liquid line is partially closed; check that the valves are open. Another cause could be a clogged liquid filter; replace the cartridge or the filter.
Why is the liquid line of my Airwell AQH 20-75 Heat Pump too hot?
If the liquid line of your Airwell Heat Pump is too hot, it's likely due to an insufficient charge. Identify and remove the cause of the loss of charge and refill.
Specific warnings regarding control system, mechanical, and electrical risks.
Safety measures to be followed before and during maintenance.
Identification of refrigerants, unit labels, and use of filter/flow switch.
Safety data for R410A refrigerant and polyester oil (POE).
Criteria for selecting a suitable installation location, considering weight, winds, and noise.
Requirements for the external water circuit, including pump, expansion tank, and pressure switch.
Instructions for connecting water lines to the unit's inlet and outlet.
Requirements for electrical connections, grounding, and protection devices.
Detailed instructions for making electrical connections to the unit.
Essential checks before starting the unit for the first time.
Sequence of operations for starting the unit and its components.
Monitoring key parameters and temperatures during initial operation.
Description of the control unit, keyboard, and parameter settings.
Explanation of alarm codes and logs displayed by the unit.
Overview of the microprocessor control system for AQC units.
Table of alarm codes, descriptions, and reset procedures.
Schematic diagram of the refrigerant circuit for AQL 20-35 units.
Schematic diagram of the refrigerant circuit for AQH 20-35 units.
Schematic diagram of the refrigerant circuit for AQL 40-75 units.
Schematic diagram of the refrigerant circuit for AQH 40-75 units.
Schematic diagram of the refrigerant circuit for AQC 40-75 units.
Electrical specifications for various unit models.
Scheduled maintenance tasks and frequency for qualified personnel.
Procedures and precautions for charging the refrigeration circuit.
General