HVAC & Air Conditioning
E04: Filter or indoor unit cleaning due
Mitsubishi Electric PEFY-20
Safe preliminary checks permitted
Documented meaning
The unit logged accumulated running hours and is requesting a documented filter service.
Model variants covered: see the model record
Documented possible causes
- · Filter loading
- · Coil fouling
- · Scheduled service interval reached
Safe preliminary checks
- · Clean or replace the filter
Professional service required
- · Clean or replace the filter
- · Confirm return air is unobstructed
- · Log the service in the equipment history
- · safe_checks_permitted
Stop and call a professional if you see
- · Burning smell, smoke, water on live parts or a tripped protective device
- · Unusual noise, vibration or a refrigerant leak