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System Replaced in Goulburn
Job summary
A Lennox air-conditioner in Goulburn was reported with an E1 error code and assessed on site. The unit was found with a communication fault between the indoor and outdoor units, and the system was replaced and commissioned.
Customer report
The customer reported a Lennox air-conditioner displaying an E1 error code. The fault was visible before assessment and the job request was for repair or a replacement quote. On site, the unit remained in fault and the outdoor section showed signs of board damage. The customer later had the system operating and was shown how to use it.
Diagnosis & technical assessment
On site, the Lennox unit displayed an E1 fault code, consistent with a communication fault between the indoor and outdoor units. Inspection of the outdoor unit identified a heavily discoloured outdoor PCB, which supported an electrical control fault at the outdoor section. Power supply and capacitor checks were carried out and both tested okay, which reduced the likelihood of a simple supply or start-component failure. The condition of the outdoor board, combined with the age of the unit, supported replacement rather than repair. The assessment also aligned with the scope for a new system, electrical works, condensate drainage and commissioning.
This job record is derived from first-party technician notes and internal job management systems (SimPRO).
Solutions delivered
The work included attending site, inspecting the outdoor unit, checking the power supply and capacitor, and completing the system replacement. The replacement decision was based on the age of the unit and the condition of the outdoor PCB, which made repair less suitable than fitting a new system. The completed scope included the new system, electrical works, condensate drainage and commissioning. After installation, the customer was shown how to operate the system.
Tools, parts & systems used
- Lennox air-conditioner
- Indoor unit FTXV50WVMA
- Outdoor unit RXV50WVMA
- 5.0kW R32 Cora RC ODU
- 5.0kW R32 Cora RC IDU
- RCBO 1P+N 16A 6KA C curve 30mA CL A 1MOD
- Isolator 35A
- Conduit
- Cable
- Duct wall cap
- Pair coil
Outcome & results
The job was completed as per quote 30248 and the system was left operating normally. The customer was shown how to use the controls after commissioning. The record indicates all working well at completion. The replacement resolved the original E1 fault condition by removing the affected system and fitting the new equipment.
This job record is derived from first-party technician notes and internal job management systems (SimPRO).
Repair vs replacement
When an air-conditioning system shows a communication fault between indoor and outdoor units, the repair decision depends on the fault source, the age of the equipment, and the condition of the control board. If a simple supply issue or failed capacitor is identified, repair may be suitable. Where the outdoor PCB shows damage or deterioration and the system is aged, replacement can be the more practical option. In this job, the checked supply and capacitor tested okay, while the outdoor board condition supported system replacement.
If a heating, cooling or refrigeration system shows signs of a fault, such as burning smells, water leaks or tripping power, switch it off where safe and contact a licensed technician.