Glastender Bar Refrigerator Error Code AC 1: Condenser Alarm Code
AC 1 is a controller code that the Glastender manual lists without a written definition. The manual names two causes, a dirty condenser coil and a refrigeration system that needs service. Clean the condenser coil, then call for service if the code stays.
Medium: a dirty coil is easy to fix, but if ignored the cabinet may lose temperature.
- Code
- AC 1
- Maker
- Glastender
- Equipment
- Bar refrigeration
- Applies to
- C1SB, C2SB, C1SL, C1SU, F1SB, F1SL with digital controller
What does Glastender error code AC 1 mean?
In the digital controller table, AC 1 appears without any written explanation. The manual gives only two causes and two actions. The causes are a dirty condenser coil and a refrigeration system that needs service, and the actions are to clean the condenser coil and to call for service. Because the manual leaves out the trigger, we cannot say what AC 1 measures or when it sets in, and we avoid guessing at a limit. The pairing of causes does point to heat rejection: the condenser has to move heat out of the cabinet, and a coil coated in dust or grease does that poorly. The system then works harder, so a cleaning step is the natural first move, and it is the only one the manual offers an operator. If the code remains after a thorough cleaning, the manual's second action is the way forward, which is a service call. AC 2 has the same causes and actions in the same table.
Affected models and control systems
Glastender bar refrigerators with a digital controller, Operation Manual OM007: models C1SB, C2SB, C1SL, C1SU, F1SB and F1SL.
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
- AC 1 shown on the controller
- Cabinet not holding the set temperature
- Compressor noise or running time that seems longer than usual
Possible causes
Listed in Glastender's documentation
- Dirty condenser coil
- Refrigeration system needs service
Other likely causes — what usually sits behind error code AC 1 on this control. A technician confirms which one it is before any part is replaced.
- Dust, lint or kitchen grease matted across the condenser fins
- Ventilation grille blocked by boxes or stored supplies
- Condenser fan blade dirty or turning slowly
- Heavy door traffic in a warm room loading the system
Safe checks before calling for service
- Unplug the unit and clear away anything stacked near the air openings.
- Brush and vacuum the condenser coil gently, following the manual, without bending the fins.
- Plug the unit back in and give it time to cool the cabinet.
- If AC 1 returns, call for service.
- Tell the technician the date of cleaning and how dirty the coil was.
How a technician diagnoses error code AC 1
- Read the controller and note the code and cabinet temperature.
- Inspect the condenser coil, fan and airflow path.
- Check the compressor and fan run, and measure voltage at the unit.
- Take refrigerant pressures and temperatures and compare them with specifications.
- Repair the cause found and confirm the code does not return after a full cycle.
- Pressure checks need gauges and certification to handle refrigerant.
- Voltage and run-circuit measurements are made on live wiring behind service panels.
How error code AC 1 differs from similar codes
AC 1 and AC 2 are listed with the same two causes and actions in the manual. The manual gives no definition that tells them apart.
Technical reference
- Document
- Operation Manual OM007: Self-Contained, Side Serviced Coolers and Frosters
- Maker documentation
- Glastender owner support
- Edition
- Rev. 06-01-25 OM007
- Models / control
- C1SB, C2SB, C1SL, C1SU, F1SB, F1SL with digital controller
- Section
- Digital Controller Operation, p. 2, Digital Controller Trouble Shooting Error Codes
- 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.
Related Glastender bar refrigeration error codes
Does AC 1 mean the compressor has failed?
Not necessarily. The manual lists a dirty condenser coil first, and a technician must test to find if the system itself needs service.
Will AC 1 go away after I clean the coil?
It may. If it does not, the manual says to call for service.
Is AC 1 the same as AC 2?
They share causes and actions in the manual but are separate codes.
Need help with Glastender error code AC 1?
A technician confirms the cause on site and gives you the price in writing before any work starts.