Dixell/Copeland ACP1 Error Code

What does Dixell/Copeland ACP1 mean?

The ACP1 alarm on the Dixell IC200CX EVO iChill controller is a condenser water pump 1 maintenance reminder. It activates when Condenser Pump 1 has accumulated operating hours exceeding the configured maintenance interval. Like AEP1 for evaporator pumps, ACP1 is a non-locking notification — the pump and system continue to operate normally. ACP2 covers Condenser Pump 2 in dual-pump installations.

Symptoms

• ACP1 displayed on the IC200CX EVO screen as a maintenance warning.
• Condenser pump and compressor operation continue normally.
• Warning persists until the condenser pump 1 hours counter is manually reset.
• Alarm or maintenance icon may illuminate on the controller display.

Common causes

• Condenser Pump 1 operating hours have reached the configured maintenance interval.
• Maintenance hours counter not reset after previous service.
• Maintenance interval parameter set to a shorter-than-intended interval.

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Diagnostic steps

1. Perform condenser pump maintenance

   Complete all scheduled maintenance on Condenser Pump 1 per the pump manufacturer's service manual — including inspection of seals, bearings, impeller, coupling, and motor electrical connections.

2. Inspect pump bearings and seals

   Check for abnormal noise, vibration, or shaft play indicating bearing wear. Inspect mechanical seals for signs of water leakage around the pump shaft.

3. Check motor electrical connections

   Inspect and torque all terminal connections at the condenser pump motor contactor and motor terminal box. Clean corroded contacts and verify correct voltage at the motor terminals.

4. Reset condenser pump 1 hours counter

   Access the IC200CX EVO service menu, navigate to the condenser pump 1 operating hours counter, and reset to zero after completing all maintenance tasks.

5. Confirm maintenance interval setting

   Verify the ACP1 maintenance interval parameter matches the pump manufacturer's recommended service interval for the application duty and running hours.

When to call a professional

Call a licensed HVAC/R technician or pump engineer if condenser pump removal is needed for bearing or seal replacement — work that requires isolating and draining the condenser water circuit — or if motor insulation testing is required to assess winding condition before the next service interval.