Although Mitsubishi air conditioners are known for being reliable, cost-effective, and efficient, they still require ongoing maintenance and repairs to perform at their best. If user’re one of the thousands of Australians who own a Mitsubishi electric system, we’re here to give users the ultimate guide to maintenance and repairs.
Whether users need to maintain a split or indoor system unit or want better indoor air quality, this article will be the best guide to air conditioner routine maintenance and repair for many Mitsubishi models. Aust Cliamte will cover everything from the most common issues to look out for, guidelines for servicing, and when it’s time to organize repairs.
Recommended Maintenance Schedule
What is recommended by heating and cooling experts? Let’s explore the common annual maintenance schedule users should follow.
- Monthly
Clean or replace indoor unit filters. Dirty filters can block airflow, making the system use more energy than it needs to. Per the manufacturer’s guidelines, replace or clean these filters every month for cleaner air circulation.
Inspect the outdoor unit for obstructions and debris. Removing leaves, twigs, grass, or debris will ensure it runs correctly.
- Seasonally (Spring and Autumn)
Before the hot summer and cold winter, this unit, including the cover, is cleaned, and the coils and fins are cleaned
Clean the outdoor unit. Before the hot summer and cold winter, this unit, including the cover, is cleaned, and the coils and fins are gently cleaned to remove dirt.
This will ensure the system lasts longer. The blades and other components of the indoor unit will need cleaning. Inspect refrigerant lines. If there are signs of leakage, a professional repair is necessary.
How Often Should Users Service the AC?
How often a user should invest in regular maintenance depends on the unit’s use, climate, indoor environment, number of occupants in the home, and even the pets. The system should be serviced at least once a year, ideally every six months, for high performance and efficiency.
Scheduling a seasonal service such as cleaning helps guarantee users get the most out of the system, maximizing energy efficiency and safety for the family. It doesn’t matter if it’s a brand-new Mitsubishi aircon or an older model, it’s essential to be aware of how to keep them in good working order.
Mitsubishi Electric Air Conditioners – Issues To Look Out For
What are some common problems with Mitsubishi Electric air conditioners? Let’s have a look at some Mitsubishi models.
- MSY-GY90VFD – Split System Indoor Unit
Beyond a non-operational unit, other key signs to look out for include when the horizontal vane doesn’t move, the mist is discharged from the air outlet of the indoor unit, it does not cool, the air from the indoor unit smells strange, a crackling sound is heard, the weekly timer doesn’t operate, or the aluminum fin of the edge of the heat exchanger is discolored.
- Split System Filters Maintenance
Primary air filters should be cleaned every 2 weeks, anti-allergy filters must be cleaned every 3 months
Mitsubishi Split Systems–such as the MSZ-AP2280–can have issues when air filters become clogged with dust and debris, so they need to be cleaned regularly.
Primary air filters should be cleaned every 2 weeks, anti-allergy filters must be cleaned every 3 months and replaced every 12 months, and plasma quad filters should be cleaned every 3 months.
- MSZ-LN-VG2 Series
Symptoms of problems include the remote controller display not appearing, the room not being cooled or heated efficiently, the indoor unit–which isn’t operating–being warm with a water flowing noise, water leaking from the outdoor unit, or white smoke being discharged from the outdoor unit.
- PEA-M100 Series
This air conditioning unit can have issues such as the fan speed changing without changing these settings, a motor rotation sound, a cracking or creaking sound being heard, water or vapor being omitted from the outdoor unit or an occasional hissing sound being heard.
Mitsubishi Electric Air Conditioning Warranties
In terms of warranty for Mitsubishi Electric systems, what can users expect? For the Air Conditioner P Series (Mr. Slim), there is a warranty of up to 5 years for parts and labor.
Air Conditioner M Series (all models) have a warranty of up to 5 years, including parts and labor. The Air Conditioner S Series (all models) also has a 5-year warranty. The Air Conditioner City Multi (Commercial) has a warranty period of up to 2 years for parts and 1 year for labor. If the user would like more information, contact the Aust Climate team for accurate information for the next purchase!
Mitsubishi AC Maintenance Tips
What are the most common maintenance tips for a Mitsubishi Electric air conditioner?
Outdoor Unit Maintenance
- Turn off the power at the main electrical panel to prevent accidents.
- Use a soft brush or vacuum to remove debris from the unit’s exterior. This prevents blockages and maintains airflow!
- Clean the fins using a garden hose to spray them from the inside out. Avoid using high pressures, as this can bend the fins.
- Check for overgrown grass around the unit, and check the base so it is stable and level.
Indoor Unit Maintenance
- Turn off the unit before cleaning to prevent dust or debris from being drawn into the system.
- Use a vacuum cleaner to remove dust from the filters and enhance air quality.
- If the filters are washable, rinse them with soapy water. Let them dry completely before reinserting to prevent mode growth.
- Open the unit’s cover and inspect the fan blades. Clean the blades with a damp cloth and check for cracks or damage affecting performance.
Heating Mode Maintenance
- Switch to heating mode at the start of the cold season to ensure it’s functioning.
- Inspect and clean the heat exchanger as per the manufacturer’s guidelines.
- Check thermostat settings. Setting it correctly will maintain the desired temperature.
- Listen for unusual noises and noise levels.
- Test the heating system. Always check for consistent airflow throughout the spaces.
Signs of Low Refrigerant Levels
A low refrigerant can cause an AC to work harder, raising energy bills and potentially causing the compressor to overheat and fail. With this in mind, what are some clear signs it isn’t working for users?
- Ice build-up of refrigerant lines or the evaporator coil.
- Increasing energy bills without a change in AC usage can mean the system works twice as hard as needed.
- Hissing or bubbling noises suggest a leak, so seek immediate repair and inspection.
Most Common AC Issues
Let’s look at the common problems the air conditioner might be having.
The system isn’t cooling the space
Low refrigerant is caused by air conditioning leakage over time, and a professional can easily replace intricate parts
If the Mitsubishi Electric system isn’t cooling properly, it could be due to blocked filters, low refrigerant, or a faulty component! Locked filters are the most common problem for air conditioning systems. When used, they slowly accumulate dust, blocking airflow and cooling efficiency. Once the user cleans them out, the air conditioner should return to normal.
Faulty components such as an electric control board, fan, or compressor can reduce the Mitsubishi’s cooling capabilities. Limited airflow can also be caused by a faulty motor damper. Low refrigerant is caused by air conditioning leakage over time, and a professional can easily replace intricate parts for the user.
The air conditioner keeps turning off and on
A faulty timer, compressor, or condenser can be the culprit.
Attempt changing the setting on the timer, but if it persists, a professional will need to replace the time. Never attempt to fix complex problems on their own!
The indoor unit isn’t turning on
Does the Mitsubishi Electric air conditioner refuse to turn on? This could indicate a tripped circuit breaker. Check the meter box for the circuit breaker and see if it turns on. If the trip switches off, switch it back on again.
If the air conditioner continues to trip the circuit breaker, the isolation switch might be a problem if it is stuck or difficult to move.
The air conditioner won’t turn off
A few things can cause the Mitsubishi Electric to not turn off. When the fan limit is set to “on” instead of “auto,” the fan will keep running regardless of thermostat settings. Press the fan button on the control panel until “auto” shows on the screen.
If the temperature is too low, the Mitsubishi air conditioner will not shut off until it reaches a set temperature. This process takes longer if the indoor environment is hot and humid. Additionally, dirty filters restrict airflow, making it harder for the AC to cool interiors until it reaches the set temperature. Clean filters once every three months.
