Tianyang Muzun's air energy fault code is r22, and the appearance of this code means that the storage of the air energy water heater is out of order. R22 is a refrigerant, which should be caused by leakage, insufficient refrigerant or air involvement.

"Tianyang Muzun" air energy water heater is a popular new energy-saving product in Hangzhou Tianyang Water Heater Co., Ltd. With its advantages of high efficiency, safety, comfort, energy saving and environmental protection, it is known as the fourth generation of new energy-saving water heaters after coal-fired gas water heaters, electric water heaters and solar water heaters, and has become a leader in the water heater industry.