Split Type Air Conditioner Maintenance Checklist

Client/Location Information

Date: _________________________
Service Technician: _________________________
Client Name: _________________________
Address / Unit Location: _________________________
Unit Make & Model: _________________________
Unit Serial Number: _________________________

Safety Precautions

I. Indoor Unit (IDU) Inspection & Service

Ref Check Item Action / Observation Status (✔ OK / ⚠ Attn / N/A) Notes / Corrective Action / Readings
1.1 Air Filters Inspect for cleanliness, damage, proper fit. [ ] Cleaned / Replaced: ____
1.2 Evaporator Coil Inspect for dust, debris, mold, fin condition. [ ] Cleaned (Method: ____) / Fins Straightened
1.3 Blower Wheel & Housing Inspect for cleanliness, balance, secure mounting. [ ] Cleaned / Secured: ____
1.4 Drain Pan & Condensate Line Inspect for blockages, cracks, leaks, proper drainage. [ ] Cleared / Flushed / Repaired: ____
1.5 Electrical Connections Inspect for tightness, corrosion, overheating (terminals, PCB). [ ] Tightened / Cleaned: ____
1.6 Fan Motor (IDU) Check for smooth operation, unusual noise, overheating. [ ]
1.7 Capacitor (IDU Fan Motor)* Test MFD rating against specification. [ ] Reading: ____ µF (Spec: ____ µF) / Replaced: Yes/No
1.8 Thermostat / Remote Control Verify proper operation, set points, battery life (remote). [ ] Batteries Replaced: Yes/No / Calibrated
1.9 Airflow & Louvers Check for unobstructed airflow, louver/swing motor function. [ ]
1.10 Noise Levels (IDU) Listen for abnormal sounds (rattling, grinding, whining). [ ] Source Identified: ____
1.11 Temperature Differential* Measure return air vs. supply air temp (ΔT). [ ] Return: __°C/F, Supply: __°C/F, ΔT: __°C/F
1.12 Unit Casing & Aesthetics Inspect for cleanliness, physical damage. [ ] Cleaned: Yes/No
1.13 PCB/Control Board (IDU)* Visual inspection for burns, loose connections, damage. [ ]

II. Outdoor Unit (ODU) Inspection & Service

Ref Check Item Action / Observation Status (✔ OK / ⚠ Attn / N/A) Notes / Corrective Action / Readings
2.1 Condenser Coil Inspect for dust, leaves, debris, fin condition. [ ] Cleaned (Method: ____) / Fins Straightened
2.2 Condenser Fan Blade & Motor Inspect for cleanliness, damage, secure mounting, smooth operation. [ ] Cleaned / Secured: ____
2.3 Capacitors (ODU Fan & Comp.)* Test MFD ratings against specifications. [ ] Fan Cap: __µF (Spec: __µF) Comp Cap: __µF (Spec: __µF) / Replaced: Yes/No
2.4 Electrical Connections Inspect for tightness, corrosion, overheating (contactor, terminals, disconnect). [ ] Tightened / Cleaned: ____
2.5 Contactor* Inspect contacts for pitting, burning, proper operation. [ ] Cleaned / Replaced: Yes/No
2.6 Compressor* Check for unusual noise, vibration, overheating (surface temp). [ ]
2.7 Refrigerant Levels/Pressures* Check suction/discharge pressures, superheat, subcooling. Visually inspect for leaks. [ ] Suction: __psi, Discharge: __psi, SH: __° SubC: __°
2.8 Voltage & Amperage Draw* Measure operating voltage and amperage for compressor & fan motor. [ ] Volts: __V, Amps (Comp): __A, Amps (Fan): __A (Specs: Comp __A, Fan __A)
2.9 Unit Casing & Clearance Inspect for cleanliness, physical damage, adequate airflow clearance. [ ] Cleaned / Clearance Verified: Yes/No
2.10 Vibration Pads/Mountings Inspect for condition, deterioration, proper support. [ ]

III. Refrigerant Lines & System Operation

Ref Check Item Action / Observation Status (✔ OK / ⚠ Attn / N/A) Notes / Corrective Action
3.1 Refrigerant Line Insulation Inspect for integrity, damage, proper coverage. [ ] Repaired / Replaced: Yes/No
3.2 Piping & Brazed Joints Inspect for kinks, physical damage, signs of leaks (oil). [ ]
3.3 Overall System Operation Verify proper cycling, temperature achievement, responsiveness. [ ]
3.4 Unusual Odors Check for any unusual smells from unit or airflow. [ ] Source Identified: ____

IV. Post-Service Checks & Client Communication

Ref Check Item Action / Observation Status (✔ OK / ⚠ Attn / N/A) Notes
4.1 System Test Run Operate unit through all modes to confirm functionality. [ ]
4.2 Clean-up Ensure work area is clean and tidy. [ ]
4.3 Client Debrief Discuss findings, work performed, and recommendations. [ ] Recommendations Communicated: Yes/No

Summary of Findings & Recommendations

Enter summary and recommendations here...

Technician Signature:

Client Signature (Optional):

*Items marked with an asterisk (*) typically require specialized tools, diagnostic skills, and refrigerant handling certification. These checks should be performed by a qualified and licensed HVAC technician.

Always refer to the specific manufacturer's service manual for detailed procedures and specifications for the unit being serviced.