Viessmann Error Code PCA1: Refrigerant pipe condensation protection (Mini-Split)
Viessmann error code PCA1 on a mini-split means: Refrigerant pipe condensation protection. It is also called Viessmann diagnostic code PCA1.
Homeowner? What Viessmann code PCA1 means for you
Usually minor Your ductless mini-split is reporting: Refrigerant pipe condensation protection. This code is usually informational or minor. The safe checks below often clear it; call us if it keeps showing up.
Safe things you can check yourself
- Check the remote: fresh batteries and the right mode (Cool, Heat or Auto).
- Check the breaker and the outdoor disconnect; both should be ON.
- Open the front cover of the indoor unit and rinse the washable filters if they are dusty; let them dry before putting them back.
- Keep the outdoor unit clear of snow, ice and leaves.
- Try one reset: turn the power off for 30 seconds, then back on. If the code comes back, stop resetting and call a technician.
Call (647) 657-2977Book a service call
Licensed technicians serving Vaughan, Toronto and the GTA.
What does Viessmann error code PCA1 mean?
The unit stopped to avoid sweating on the refrigerant pipe. The manual gives no flow chart for this code.
Applies to: DLCMRBH / DLCMHBH multi-zone outdoor units 18-48K (Midea, Carrier, Viessmann Vitocal 200-S)
Viessmann models that use code PCA1
DLCMHBH24CAKDLCMHBH30DAKDLCMHBH36DAKDLCMHBH48EAKDLCMRBH18BAKDLCMRBH36DAKDLCMRBH48EAK
Other Viessmann Mini-Split codes
All Viessmann Mini-Split error codes →
Viessmann code PCA1: homeowner questions
What does Viessmann code PCA1 mean?
Refrigerant pipe condensation protection. The unit stopped to avoid sweating on the refrigerant pipe. The manual gives no flow chart for this code.
Is it safe to keep using my ductless mini-split with code PCA1?
Usually yes. Code PCA1 is normally minor, but if it keeps coming back have it checked.
Can I reset Viessmann code PCA1 myself?
You can try one reset (power off for 30 seconds, then on). If Viessmann code PCA1 comes back, the cause is still there and a licensed technician should check it.
Who can fix Viessmann code PCA1 near me?
Aurora Star Tech Inc. repairs Viessmann ductless mini-splits in Vaughan, Toronto and across the GTA. Call (647) 657-2977 or book a service call online.
Homeowner help: AC Running But Not Cooling: What to Check · Heat Pump Not Heating or Blowing Cold Air
Troubleshooting guides
- Indoor unit leaking water All brands · Mini-Split
- Poor capacity / high head All brands · Mini-Split
- Water leaking All brands · Mini-Split
- Discharge the inverter capacitors before service Viessmann · Mini-Split
- Display shows a strange code or does not answer the remote - DLFSHB indoor Viessmann · Mini-Split
- Multi-zone: one room heats, another will not cool - DLC multi-zone Viessmann · Mini-Split
- Read live data with the outdoor check button (SW1) Viessmann · Mini-Split
- Run the automatic wiring / piping correction Viessmann · Mini-Split
Source: DLCMRBH/DLCMHBH Multi-Zone Outdoor Service Manual (sold as Midea, Carrier and Viessmann Vitocal 200-S; Viessmann doc 6225551-03, 12/2024), Table 23 Outdoor Unit Error Display p.26. Written in our own words as a summary; always check the original manual.
General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.