Equipment and Services Available

Charging Stations
MISTERmatic has all the specialist equipment to charge any air conditioning system and also has the required recovery stations to discharge systems in a safe and environmentally friendly manner.

		Recycling & Recovery Station
	Dial a Charge System		Strain Gauge System

Pressure Gauges
An accurate diagnosis and determination of air conditioning system function and more importantly malfunction, depends largely upon the ability of the technician to interpret gauge pressure readings.
An improper gauge reading will relate to a specific problem. A system operating normally will have a low-side gauge pressure reading that corresponds with the temperature of the liquid refrigerant as it becomes a vapour while removing heat from the air flowing over the evaporator coil surface. The high-side gauge readings should correspond with the temperature of the refrigerant vapour as it becomes a liquid while giving up heat to the ambient air flowing through the condenser.
Any deviation from ambient dependant normal gauge readings, other than slight, indicates a malfunction. This malfunction, if within the system, may be caused by a faulty control device, a restriction, or a defective component.

Leak Detection
Refrigerant leaks must be found and rectified, as a low refrigerant charge will cause system damage.
Air and moisture can enter a system at the leak point and cause internal components to corrode.

Compressor lubrication depends on refrigerant circulation.
Refrigerant helps cool the compressor.

MISTERmatic uses the following techniques to quickly identify leaks.

Leak Detection Methods

Visual Leak Detection
When a refrigerant leak occurs, it is common for the lubricating oil to escape along with the refrigerant. The presence of oil and encrusted dust around hose fittings, joints and components will indicate a leakage point.

	Soap Solution A mixture of dish washing liquid and water applied around the A/C system pipes and fittings will form bubbles at the leakage points.
	Electronic Leak Detector These leak detectors operate in various ways, the most common being when the unit is turned on, a low ticking sound can be heard and once the probe locates a leak, the ticking sound increases to a high pitched noise. This can be achieved by moving the sensing tip slowly around the underside of the components and fittings.
	Ultraviolet Fluorescent Systems A fluorescent coloured dye is injected into the A/C system and allowed to circulate, then a specially designed ultraviolet lamp is passed over each component in the A/C system. If a leak is evident, the coloured dye glows bright. This method is good at pin pointing small leaks.
	Refrigerant Dye This dye is injected into the A/C system via the charging port. The A/C system is then operated, if a leak is present, this dye will emerge and show as a stain around the fitting or component.

Pressure Switches -
Electrical Test
When tracing a fault in the A/C circuit, always check for power at both sides of possible pressure switch terminals with a multimeter. If the pressure switch is deactivated this could indicate a refrigerant over or under charge.

Electronic Climate Control
MISTERmatic is also able to verify the operation of ECC systems and find components at fault.

Diagnostic Testing Example