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Braemar Error Codes & Troubleshooting
This Braemar troubleshooting page is designed to help you understand common fault codes and take safe first-step checks before arranging a technician. Use the code list below to match displayed errors with likely system behavior.
Many Braemar issues can be narrowed down by checking basic airflow conditions, power supply stability, and controller resets. For electrical faults, refrigerant concerns, or repeated critical codes, professional diagnosis is recommended to avoid further damage.
If you need help with your Braemar unit in Melbourne, our licensed team can provide same-day assessment, repair options, and maintenance guidance to keep your cooling system reliable.
Braemar Error Codes & Troubleshooting
Braemar specializes in evaporative cooling systems designed for Australian climate conditions.
How to use this troubleshooting guide effectively
Start by matching the exact Braemar error code shown on your controller and reviewing the listed symptom details. Complete only safe checks such as restarting the controller, confirming airflow, and inspecting accessible filters. Avoid opening sealed panels or handling electrical and refrigerant components.
If a Braemar error returns after reset or appears repeatedly, a deeper diagnostic inspection is usually required. Our Melbourne technicians can identify underlying causes quickly and recommend repair or replacement options based on system age, efficiency, and parts availability.
Error Code: b5
Indoor unit liquid valve temperature sensor open/short circuit
Troubleshooting Steps:
Check liquid valve temperature sensor connections and wiring. Replace sensor if faulty.
Error Code: b7
Indoor unit liquid valve temperature sensor open/short circuit
Troubleshooting Steps:
Inspect liquid valve temperature sensor for open or short circuit. Professional diagnosis required.
Error Code: F1
Return air temperature sensor open/short circuit
Troubleshooting Steps:
Check return air temperature sensor wiring and connections. Replace if damaged.
Error Code: F2
Evaporator temperature sensor open/short circuit
Troubleshooting Steps:
Inspect evaporator temperature sensor for proper operation and connections.
Error Code: F3
Outdoor ambient temperature sensor open/short circuit
Troubleshooting Steps:
Check outdoor ambient temperature sensor wiring. Replace if faulty.
Error Code: F4
Outdoor mid-tube temperature sensor open/short circuit
Troubleshooting Steps:
Inspect outdoor mid-tube temperature sensor connections and operation.
Error Code: F5
Discharge temperature sensor open/short circuit
Troubleshooting Steps:
Check compressor discharge temperature sensor for proper operation.
Error Code: P7
IPM temperature sensor open/short circuit
Troubleshooting Steps:
Inspect IPM temperature sensor wiring and connections. Professional replacement required.
Error Code: Pd
Sensor connection protection
Troubleshooting Steps:
Multiple sensor connection issue detected. Check all sensor connections and wiring.
Error Code: PE
Temperature drift protection
Troubleshooting Steps:
Temperature sensor drift detected. Calibration or replacement may be required.
Error Code: PF
Drive board temperature sensor error
Troubleshooting Steps:
Drive board temperature sensor malfunction. Professional diagnosis and repair required.
Error Code: dn
Communication line misconnected/expansion valve error
Troubleshooting Steps:
Check communication cables between units and expansion valve operation.
Error Code: E6
Communication error
Troubleshooting Steps:
Communication fault between indoor and outdoor units. Check connecting cables.
Error Code: E7
Running mode conflict
Troubleshooting Steps:
System mode conflict detected. Check unit settings and operation mode.
Error Code: P6
Drive board communication error
Troubleshooting Steps:
Communication error with drive board. Professional diagnosis required.
Error Code: LP
Indoor & outdoor units unmatched
Troubleshooting Steps:
Unit configuration mismatch. Check system compatibility and settings.
Error Code: E1
Compressor high-pressure protection
Troubleshooting Steps:
High pressure protection activated. Check refrigerant levels and airflow restrictions.
Error Code: E3
Compressor low-pressure protection
Troubleshooting Steps:
Low pressure protection activated. Check for refrigerant leaks or undercharge.
Error Code: E4
Compressor high discharge temperature protection
Troubleshooting Steps:
Compressor discharge temperature too high. Check refrigerant charge and system operation.
Error Code: H3
Compressor overheating protection
Troubleshooting Steps:
Compressor overheating detected. Check cooling and ventilation around unit.
Error Code: H5
IPM current protection
Troubleshooting Steps:
IPM overcurrent protection activated. Professional diagnosis required.
Error Code: H6
Motor stalling
Troubleshooting Steps:
Compressor motor stalling detected. Immediate professional attention required.
Error Code: H7
Compressor desynchronising protection
Troubleshooting Steps:
Compressor synchronization error. Professional diagnosis and repair required.
Error Code: HE
Compressor demagnetization protection
Troubleshooting Steps:
Compressor demagnetization detected. Professional replacement may be required.
Error Code: Lc
Compressor startup failure
Troubleshooting Steps:
Compressor failed to start. Check power supply and compressor operation.
Error Code: Ld
Compressor phase loss/reversal protection
Troubleshooting Steps:
Phase loss or reversal detected. Check electrical connections and phase sequence.
Error Code: LE
Compressor stalling
Troubleshooting Steps:
Compressor stalling protection activated. Professional diagnosis required.
Error Code: E2
Indoor anti-freeze protection
Troubleshooting Steps:
Anti-freeze protection activated. Check airflow, filters, and refrigerant levels.
Error Code: E5
Whole unit over-current protection
Troubleshooting Steps:
System overcurrent protection activated. Check electrical connections and components.
Error Code: E8
Overload protection
Troubleshooting Steps:
System overload protection activated. Check electrical supply and component operation.
Error Code: E9
Indoor unit full water protection
Troubleshooting Steps:
Water overflow protection activated. Check drainage system and water removal.
Error Code: H1
Forced defrosting
Troubleshooting Steps:
System in forced defrost mode. Normal operation during cold weather conditions.
Error Code: Fo
Pump-down
Troubleshooting Steps:
System in pump-down mode. Normal operation during shutdown sequence.
Error Code: En
Frequency restricted/reduced with IPM current protection
Troubleshooting Steps:
Operating frequency reduced due to IPM current protection. Check system load.
Error Code: EU
Frequency restricted/reduced with IPM temperature protection
Troubleshooting Steps:
Operating frequency reduced due to IPM temperature protection. Check cooling.
Error Code: FH
Frequency restricted/reduced anti-freezing protection
Troubleshooting Steps:
Operating frequency reduced for anti-freeze protection. Check airflow.
Error Code: F6
Frequency restricted/reduced with overload protection
Troubleshooting Steps:
Operating frequency reduced due to overload protection. Check system load.
Error Code: F8
Frequency restricted/reduced with whole unit current protection
Troubleshooting Steps:
Frequency reduced due to current protection. Check electrical connections.
Error Code: F9
Frequency restricted/reduced with high discharge temperature
Troubleshooting Steps:
Frequency reduced due to high discharge temperature. Check refrigerant charge.
Error Code: LF
Over-speeding
Troubleshooting Steps:
Motor over-speeding detected. Check motor control and electrical supply.
Error Code: Hc
Pfc protection
Troubleshooting Steps:
Power factor correction protection activated. Check electrical supply and connections.
Error Code: PH
DC Bus over-voltage protection
Troubleshooting Steps:
DC bus overvoltage detected. Check power supply voltage and electrical connections.
Error Code: PL
DC Bus under-voltage protection
Troubleshooting Steps:
DC bus undervoltage detected. Check power supply and electrical connections.
Error Code: PP
AC input voltage abnormal
Troubleshooting Steps:
AC input voltage outside normal range. Check electrical supply voltage.
Error Code: PU
Capacitor charging error
Troubleshooting Steps:
Capacitor charging fault detected. Professional electrical diagnosis required.
Error Code: P5
Over phase current protection
Troubleshooting Steps:
Phase current exceeds safe limits. Check electrical connections and load.
Error Code: F0
System charge shortage/blockage protection
Troubleshooting Steps:
Refrigerant shortage or system blockage detected. Check for leaks and restrictions.
Error Code: LA
Outdoor fan 1 error protection
Troubleshooting Steps:
Outdoor fan motor error detected. Check fan operation and remove obstructions.
Error Code: L3
Outdoor fan 1 error protection
Troubleshooting Steps:
Outdoor fan motor malfunction. Check motor operation and electrical connections.
Error Code: L9
Over-power protection
Troubleshooting Steps:
System over-power protection activated. Check electrical supply and system load.
Still Having Issues with Your Braemar System?
Our certified technicians are experts in Braemar air conditioning systems. We provide professional diagnosis, repair, and maintenance services across Melbourne.
Available 24/7 for emergencies
Prevent future faults with routine maintenance
Most recurring Braemar fault codes are linked to blocked airflow, worn components, drainage issues, or delayed seasonal servicing. A scheduled maintenance plan can reduce emergency breakdowns, improve energy efficiency, and protect your warranty obligations.
We recommend a professional service before summer to test performance, clean critical components, and confirm your Braemar system is operating safely and reliably.