About Aldağ fan coils
Origin: Türkiye (Aldağ A.Ş., İstanbul). In Türkiye: Made in Türkiye; the fan coils are produced at the Akhisar factory.
Aldağ fan coil series we service
- AE series (FCU)
- AFC series (high-pressure ducted)
- AKF series (4-way cassette)
Unit types
Service highlights
- Double-inlet centrifugal fan and 3-speed motor on the AE series
- High external static pressure on the AFC series
Our services for Aldağ fan coils
Aldağ fan coil maintenance
Checks of filters, coil, drain pan, drainage, fan, valves and thermostat; documented periodic maintenance.
Aldağ fan coil faults and repair
On-site repair of water leaks, no cooling, fans not turning, valve and controller faults.
Cleaning and filters
Chemical coil washing, drain pan disinfection, filters cut to size.
Aldağ fan coil spare parts
Supply and fitting of compatible motors, valves, thermostats, pumps and other parts.
Aldağ fan coil error codes
Most Aldağ fan coils run on a 3-speed motor and a simple room thermostat; the manufacturer has not published an error code list for these units. Faults are diagnosed from symptoms and measurements. In projects using an electronic controller or networked thermostat, the codes depend on the controller's own brand.
| Symptom | Possible cause | Details |
|---|---|---|
| Water leaking | Blocked drain, overflowing or cracked drain pan, sweating valve | Fix |
| Cassette condensate pump alarm | Float switch or pump fault, blocked drain | Pump |
| No cooling / no heating | Stuck motorized valve, air in the coil, dirty filter | Fix |
| Fan not turning | Capacitor, motor or speed control | Fix |
| Noise and vibration | Dirty or unbalanced fan wheel, bearing | Fix |
| Weak airflow (ducted type) | Dirty filter, duct connection, low fan speed | Cleaning |
Common thermostat warnings
Warnings shown on Siemens RDF series thermostats, which are often used with Aldağ fan coils:
| Indication | Meaning | What to do |
|---|---|---|
| AL1 | External fault input X1 active (e.g. drain alarm) | Check the device connected to input X1. |
| AL2 | External fault input X2 active | Check the device connected to input X2. |
| FIL | Filter cleaning reminder | Clean the filter and reset the warning. |
| Dew (condensation) symbol | Condensation detected in the room, cooling stopped | Check humidity and water temperature. |
Is your Aldağ fan coil showing a code?
Send a photo of the controller display and the unit's rating label and we will interpret it right away.
Aldağ fan coil controllers and thermostats
On Aldağ fan coils we replace faulty or outdated thermostats with new models suited to the unit's 2/4-pipe configuration, valve type and motor speeds: mechanical, digital, weekly programmable and Modbus / BACnet / KNX networked options. Thermostat options →
Aldağ fan coil spare parts
Aldağ fan coil motor
Compatible part supply and fitting
Aldağ capacitor
Compatible part supply and fitting
Aldağ fan wheel
Compatible part supply and fitting
Aldağ motorized valve
Compatible part supply and fitting
Aldağ actuator
Compatible part supply and fitting
Aldağ thermostat
Compatible part supply and fitting
Full spare parts catalog (28 parts) →
Aldağ fan coil service in Ankara
We service Aldağ fan coils on-site in every district of Ankara. We prepare bulk maintenance plans for office towers, hospitals, hotels, schools, shopping malls and residential complexes. For Aldağ units outside Ankara, we start with a pre-diagnosis from photos and videos, followed by a scheduled visit with the required parts.
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Trane fan coil serviceFrequently asked questions
Do you service Aldağ fan coils on-site in Ankara?
Yes. Our base is in Etimesgut; we carry out on-site maintenance, fault repair and part replacement on Aldağ fan coils in every district of Ankara. For Aldağ units outside Ankara we provide scheduled service across Türkiye.
Are you the authorized Aldağ service?
No. YOİ Mühendislik is an independent service holding the TSE Service Adequacy Certificate (HYB No: 12850); we service all brands, including Aldağ, independently of the manufacturer. For units still under warranty, we recommend checking the manufacturer's terms first.
What does a Aldağ fan coil error code mean?
Many Aldağ fan coils are 3-speed units with a simple thermostat and have no published error code list. If you see a code on the display of a model with an electronic controller, send us a photo and we will interpret it based on the controller and board model.
Are Aldağ fan coil spare parts available?
For parts such as motors, capacitors, motorized valves, actuators, thermostats, drain pans, condensate pumps, filters and fan wheels, we supply original parts that fit Aldağ units or equivalents whose technical ratings match exactly. A photo of the rating label is enough.
How often should Aldağ fan coils be serviced?
A full service at least twice a year, before the cooling and heating seasons; filter checks are recommended every 1–3 months depending on usage.