C5 • Gree • Split / U-Match
Fault Code C5 Gree: Missing Jumper Cap
Code C5 is a pure configuration error. On the PCB, a small jumper cap (plastic plug with a wire) defines the unit size. If it is missing, the air conditioning will not start.
Proof status : Manufacturer reference needed for the exact range
Source: Gree PCB Configuration Guide
Founder, AskMarcel.app
Founder of AskMarcel.app. Sheets are written from manufacturer documentation; the reference is shown when it has been verified.
In brief
Fault code C5 on Gree Split / U-Match means: Code C5 is a pure configuration error. On the PCB, a small jumper cap (plastic plug with a wire) defines the unit size. If it is missing, the air conditioning will not start. Most common cause: Jumper cap omitted during PCB replacement, or incorrectly inserted at the factory. First action: Open the indoor unit.. Call a registered engineer if the fault returns after basic checks or involves refrigerant work (F-Gas registered engineer required).
According to the Gree PCB Configuration Guide, code C5 is triggered by a missing or incorrectly inserted jumper cap on the main PCB, which prevents the system from starting.
Continue this diagnosis in Marcel
Gree code C5: Marcel picks this code up for Split / U-Match and guides you, with the manufacturer reference when one exists.
For regular use on site: Install the app
What does fault code C5 on Gree mean?
Code C5 is a pure configuration error. On the PCB, a small jumper cap (plastic plug with a wire) defines the unit size. If it is missing, the air conditioning will not start.
Jumper cap omitted during PCB replacement, or incorrectly inserted at the factory.
Symptoms
- Unable to start
- Immediate code C5
Diagnosis
1. PCB Inspection
- Open the indoor unit.
- Locate the 'Jumper Cap' on the wiring diagram and check its presence on the PCB.
Repair and return to service — Gree fault C5
Refit the original jumper cap. If lost, order a model-specific one (it has a precise resistance value).
When should you call an F-Gas engineer?
Contact an F-Gas registered engineer if the fault returns after basic checks, involves refrigerant charging, or requires PCB or compressor replacement on Gree Split / U-Match.
Affected models
- High-Static Slim Duct
- Universal Floor/Ceiling
- Livo Plus
- All Match Floor/Ceiling
- All Match Mini Console
Field context
This code occurs during installation or maintenance of indoor units, particularly after a PCB replacement where the configuration jumper cap was omitted or incorrectly inserted. It prevents system start-up to avoid hardware configuration errors.
Frequently asked questions
Why does the unit not start even though the remote control works?
Code C5 activates a hardware protection that blocks start and stop commands on the main PCB. Although the infrared receiver and remote control buttons are operational, the system refuses to execute cycle-related instructions due to a detected anomaly on the configuration jumper cap (Extract 1, 5, 8).
What are the precise technical causes of code C5?
Service manuals identify four main causes: 1) Complete absence of the jumper cap on the main PCB; 2) Incorrect insertion positioning of the jumper cap; 3) Physical deterioration of the jumper cap itself; 4) Anomaly in the detection circuit on the PCB (Extract 1, 2, 5, 8).
How can I visually identify the problem on the PCB?
Diagnosis relies on physical inspection of the main PCB. Check whether the jumper cap (plastic plug with wire) is properly inserted into its dedicated slot. A missing or incorrectly inserted jumper cap will immediately trigger code C5 and prevent any system operation (Extract 1, 5, 8).
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