Vapor pressures | Haier HC42D2VAR, HC36D2VAR, HC30D2VAR, HC24D2VAR

Symptom	Possible Cause	Remedy
	Power off or loose electrical connection	Make sure main switch is ON. Check and tighten all connections.
	Incorrect thermostat setting	Set thermostat correctly
No cooling	Defective contactor	Check for 24V at contactor coil.
	Open circuit breaker of blown fuses	Reset or replace
	Defective transformer	Check wiring - Replace it.
	Interconnecting low voltage wiring damage	Replace thermostat wiring
	Dirty filters	Clean & replace
	Indoor air blockage	Check supply registers and return grills for blockage.
	Blocked outdoor coil	Clear away leaves and other debris
	Improperly sized unit	Recalculate load
Insufficient Cooling	Improper airflow	Check - should be 400CFM/Ton
	Incorrect refrigerant charge	Charge correctly per instruction.
	Air, non-condensibles or moisture in system	Recover refrigerant, evacuate & recharge, add filter drier
	Incorrect voltage	At compressor terminals, voltage must be within
		10% of rating plate volts when unit is running.
Water on floor or in
furnace	Blocked condensate drain and "P" trap	Remove blockage

	Run or start capacitor defective	Replace
	Loose connection	Check and tighten all connections.
Condenser fan runs,	Compressor stuck, grounded or open	Wait for 2 hours for overload to reset.
compressor doesn't	motor winding, open internal overload	Replace compressor if still open.
	Low voltage condition	At compressor terminals, voltage must be within 10% of rating
		plate volts when unit is running.
	Low voltage condition	Add start kit components
	Incorrect voltage	At compressor terminals, voltage must be within 10% of rating
Compressor		plate volts when unit is running.
short-cycling	Defective overload protector	Replace - check for correct voltage
	Refrigerant undercharge	Add refrigerant
Register sweat	Low evaporator airflow	Increase blower speed or reduce restriction - replace air filter
	Restriction in liquid line,	Replace defective components
High head - Low	metering device or filter drier
vapor pressures	Flowrator piston size too small	Change to correct size piston
	Incorrect capillary tubes	Change coil assembly
	Blocked outdoor coil	Clear away leaves and other debris
High head - High	Refrigerant overcharge	Correct system charge
or normal vapor	Condenser fan not running	Repair or replace
pressures	Air, non-condensibles or	Recover refrigerant, evacuate &
	moisture in system	recharge, add filter drier
Low head - High	Flowrator piston size too large	Change to correct size piston
vapor pressures	Defective compressor valves	Replace compressor
	Incorrect capillary tubes	Replace coil assembly
Low vapor - cool	Low evaporator airflow	Increase blower speed or reduce restriction - replace air filter
compressor - iced	Operating below 65 F outdoors	Add low ambient kit
evaporator coil	Moisture in the system	Recover refrigerant, evacuate & recharge, add filter drier
High vapor	Excessive load	Recheck load calculation
pressure	Defective compressor	Replace
Fluctuating head	Air or non-condensibles in system	Recover refrigerant, evacuate & recharge.
and vapor pressures
Pulsing noise at	Air or non-condensibles in system	Recover refrigerant, evacuate & recharge
metering device
or liquid line

HC18D2VAR, HC24D2VAR, HC30D2VAR, HC36D2VAR, HC42D2VAR specifications

Haier has long been a name synonymous with innovative home appliances, and their line of high-efficiency mini-split air conditioning systems exemplifies this tradition of excellence. Among the standout models are the HC18D2VAR, HC24D2VAR, HC30D2VAR, HC36D2VAR, and HC42D2VAR. Each of these units brings unique features tailored to meet diverse cooling needs while emphasizing efficiency, comfort, and usability.

The HC18D2VAR is designed for smaller spaces, affording homeowners effective cooling without breaking the bank on energy costs. It features variable refrigerant flow technology, allowing the system to adjust its capacity based on the current temperature and cooling load. This ensures optimal energy use while maintaining a consistent indoor environment. The built-in inverter technology further enhances efficiency, reducing energy consumption compared to traditional systems.

Moving to the HC24D2VAR, this model expands its capabilities, making it suitable for medium-sized rooms or offices. It boasts a sleek design that allows for discreet installation, while the advanced air filtration system effectively captures dust, pollen, and other allergens, enhancing indoor air quality. Additionally, its quiet operation ensures minimal disruption, making it ideal for bedrooms and study areas.

The HC30D2VAR is tailored for slightly larger applications, with superior cooling and heating performance. This model incorporates smart technologies such as Wi-Fi connectivity, enabling users to control their air conditioning remotely via a smartphone app. It also featuresmultiple airflow settings and a programmable timer that provides convenience for busy lifestyles.

For those needing even more cooling power, the HC36D2VAR and HC42D2VAR models are designed to handle larger spaces while maintaining energy efficiency. These units come equipped with advanced cooling technologies, including turbo cooling mode for quick temperature adjustment, and an extended range of operating temperatures, ensuring reliable performance in varying climates. The sleek aesthetic of these models blends seamlessly with modern interior designs.

All five models are equipped with user-friendly interfaces and remote control options, simplifying the adjustment of settings distance. With their high Seasonal Energy Efficiency Ratios (SEER), these Haier units provide a balance of comfort and efficiency, making them an excellent choice for homeowners looking to enhance their living environment while being environmentally conscious.

Overall, the Haier HC18D2VAR, HC24D2VAR, HC30D2VAR, HC36D2VAR, and HC42D2VAR models present a comprehensive solution for modern cooling needs, combining technology, efficiency, and design into one impressive package.

and vapor pressures

HC18D2VAR, HC24D2VAR, HC30D2VAR, HC36D2VAR, HC42D2VAR specifications