Traulsen Refrigerator Error Code Clean Filter: Condenser Alarm

What does Traulsen Clean Filter / CLean FiLter / CLN-FIL mean?

A refrigerated cabinet depends on its condenser to give off heat. When the condenser filter or coil is dirty, the heat cannot leave, and pressures and temperatures climb. The Intela-Traul control watches for that, and when it sees values above the safe range it shows the condenser clean alarm. The wording differs by model: Clean Filter and CLean FiLter on R and A Series and TS Series, and CLN-FIL on the TS Series and the TU undercounters. On the TS Series, a discharge temperature above 140 F triggers the alarm, and above 160 F the compressor and fan switch off until it falls below 140 F. After 24 hours the words Call Service are added. The manual lists a dirty condenser coil or filter limiting airflow, a fan not moving enough air, a cabinet in a tight or hot space, and a discharge sensor reading high. Cleaning is the operator's job, but only to the extent the owner's manual shows.

Affected models and control systems

Traulsen Intela-Traul R and A Series and TS Series cabinets (Clean Filter, CLean FiLter) and TU undercounters (CLN-FIL).

Code numbers and their meaning can change between control generations. We match the full model and control before acting on a code.

What you may notice

• Clean Filter or CLN-FIL shows and an alarm sounds
• The cabinet runs warm or the compressor stops on the TS Series above 160 F
• Call Service is added after 24 hours

Possible causes

Listed in Traulsen's documentation

• Dirty condenser coil or filter limiting airflow
• Fan not moving enough air
• Cabinet in a tight or hot space
• Discharge sensor reading high

Other likely causes — what usually sits behind Clean Filter / CLean FiLter / CLN-FIL on this control. A technician confirms which one it is before any part is replaced.

• Grease-laden kitchen air that coats the filter faster than the usual cleaning schedule
• A cabinet built in with too little clearance for the condenser airflow

Safe checks before calling for service

How a technician diagnoses Clean Filter / CLean FiLter / CLN-FIL

1. Read the message and ask when the filter was last cleaned.
2. Inspect the condenser coil and filter and clean them.
3. Check that the condenser fan runs and moves air.
4. Check the clearance and ambient heat around the cabinet.
5. Compare the discharge sensor reading with a thermometer on the line.
6. Replace the fan or sensor only after the tests.

How Clean Filter / CLean FiLter / CLN-FIL differs from similar codes

Clean Filter is the condenser alarm. Call Service (system leak) is a different alarm for a possible refrigerant leak.

Technical reference

Document

TS Series Owner Manual, VII-b Alarm explanations

Edition

FORM NUMBER TR35743 REV. 10/06, P/N 375-60176-00 (the replacement copy is Rev 10/06, not Oct 2004; the title we cited says Oct 2004)

Models / control

Intela-Traul R & A and TS; TU shows CLN-FIL

Section

VII. A - Alarm Explanations (INTELA-TRAUL), printed p. 9 (PDF p. 10)

Checked

October 2026

We use the maker's document to read the code and do not reproduce it. Always confirm the complete model and control before applying these steps.