Automatic water pump MITSUBISHI WP-205R2, round body, power 200 watts

Automatic water pump MITSUBISHI WP-205R2 round tank 200W
The Mitsubishi WP-205R2 automatic water pump is a highly popular pump, ideal for medium-to-small residential houses (2-3 stories). Powered by a 200-watt motor, it delivers consistent water pressure throughout the house even when multiple taps are opened simultaneously. The pump is designed for high durability with a rust-free bronze pump head and thermal protector. In addition, it features an automatic pressure control system to save energy, along with a pressure tank coated with special paint both inside and out, ensuring safe water usage.

Key Features
- Round tank automatic water pump operates automatically based on turning taps on and off
- 200W motor delivers continuous and consistent water pressure
- Ideal for 2-3 story houses suitable for 1-5 tap points
- Maximum suction depth 8 meters effectively draws water from shallow water sources
- Maximum head 22 meters delivers water far and thoroughly
- Maximum flow rate 59 L/min provides sufficient water volume for usage
- Bronze pump head durable and rust-free
- Thermal Protector prevents motor damage during abnormal operation
- Check Valve seals shut when the pump stops operating to prevent backflow
- Special coated pressure tank (Food Grade) safe and rust-resistant both inside and out
- Energy Label No. 5 helps reduce energy costs
- Motor warranty ensures confidence in quality and lifespan

Mitsubishi round tank or pressure tank water pump
Another water pump brand that has been popular in Thailand for a long time. Features a large pressure tank structure in yellow with a black base, enclosed with an Aluminum Frame Cooling Fan material that helps prevent animals or insects from getting inside and causing noise. The pump head assembly made of copper alloy is durable and rust-free.  The specially designed tank is welded with Seam Welding technology, withstanding high pressure without leaking, and is coated with special non-toxic paint both inside and outside to provide excellent rust prevention. The tank cover is made of special flame-retardant, strong, and durable plastic.  Proprietary air charger rapidly replenishes air to reduce frequent cycling issues. In addition, it features a backflow prevention system and a tank pressure control system, operating automatically based on the opening and closing of water taps. Equipped with a special ceramic seal gasket that is extra thick and durable. Enhanced safety with a ground wire ensures safety during installation and operation. Certified to ISO standards.

 Which type of round tank water pump is suitable for how many stories of a house?
Suitable for general houses with few taps in use that require high delivery pressure 
How many watts of water pump should be used?
1-story house: wattage from 100-200 W should be used
2-story house: wattage from 250-300 W should be used
For a 3-4 story house, dormitory, or commercial building, a wattage of 300 watts or higher should be used.
However, some houses still experience insufficient water pressure despite purchasing according to the recommended wattage for each story. This might be because the house has many rooms or family members requiring higher-than-normal water usage. Therefore, in addition to calculating the wattage based on the number of stories, the actual water consumption in the household must also be taken into account.

Maintenance tips for long-lasting water pump use
1. Observe pump operation, such as whether water pressure flows strong and normally, whether the sound is normal, and whether the pump cuts in and out properly.
2. You should open the cover to check the interior for any leaks.
3. Prevent any leaks inside the house. If leaks are left unattended for a long time, the water pump will work harder and more frequently, overloading the motor unnecessarily and increasing electricity costs.
4. Always close the faucet completely right after use.
5. Check the cleanliness of the water in the water tank to prevent debris, dirt, and sand from entering the pump.

Basic troubleshooting for common issues with Mitsubishi round tank water pumps

1. Mitsubishi round tank pump frequently turns on and off
Assume first that it might be caused by a leak at the water pump or in the household piping system. The check is simple: just close the outlet valve and observe whether the pump still operates. If the frequent cycling stops → this indicates a leak inside the house. But if it persists, it indicates a leak at the pump itself, which may be caused by a worn mechanical seal or a leaking, deteriorated pressure tank. 

2. Mitsubishi round tank pump does not work
First, check what type of failure it is: power is connected and there is a humming sound but the motor doesn't rotate, or it is completely silent.

3. Mitsubishi water pump does not work, power is on with a humming sound, but the motor does not rotate 
1. It may be caused by a deteriorated, shorted, or burned capacitor. To check, turn off the circuit breaker, remove the machine cover using a Phillips screwdriver to unscrew the cover, then open the condenser/capacitor cover. Then inspect the capacitor (the small black rectangular unit) to see if it is swollen or burned. If abnormal, take it as a sample or check its microfarad (uF) rating and visit a water pump spare parts shop to buy a replacement by splicing the wires. 
2. Caused by damaged bearings or a jammed impeller. To check, turn off the breaker, use a flathead screwdriver to turn the shaft at the rear end of the motor to see if it rotates normally, or remove the motor cooling fan cover and rotate the fan by hand to see if it turns smoothly. If not, it could be caused by damaged bearings that are rusted out or foreign objects trapped inside the impeller.

4. Mitsubishi water pump does not work, does not turn on, and is completely silent; this may be due to no power coming in.
This can be caused by a broken power cord or a faulty pressure switch. To check, verify whether power is reaching the water pump by removing the machine cover, followed by opening the motor capacitor cover. Then use a test light screwdriver to check. If power is normal, it could be a faulty pressure switch. To check: turn off the breaker, open the pressure switch cover with a Phillips screwdriver, and check if the switch is stuck. Fix it by replacing with a new pressure switch.

5. Mitsubishi water pump does not work due to excessive temperature
Current models have an automatic cut-off system to prevent motor burnout. The solution: stop using the water pump, turn off the breaker, wait for the motor to cool down, and then turn it back on.

Abnormal loud noise in MITSUBISHI round tank water pumps can usually arise from several causes, but mostly include:
1. The cooling fan impeller is degraded, cracked, broken, or insects have gotten inside causing abnormal noise. Solution: Use tools including a Phillips screwdriver and snap ring pliers. Use the Phillips screwdriver to unscrew and open the fan cover, then use the snap ring pliers to remove the retaining snap ring, pull out the old impeller, insert the new impeller, and reassemble as before.

2. There are stone fragments, sediment, or gravel that slipped into the water pump impeller. Solution: Use a socket or No. 8 T-handle wrench to unscrew and remove the pump casing/impeller cover, taking care not to tear or damage the front pump gasket, then clean and remove all foreign objects completely and reassemble as before.

3. Damaged or worn bearings. Symptoms: continuous loud noise throughout operation.  This may be caused by rust resulting from a worn shaft seal that allowed water into the bearing, or bearings cracked from prolonged service life. The solution must be handled by a skilled technician; it is recommended to contact a nearby technician to inspect it.