Troubleshooting methods for water heater maintenance points of Wuhan manufacturers: 027-8560-099 1- No heating, air leakage, insufficient pressure, no ignition, overheating alarm, abnormal sound, no hot water and unstable flame. ...
Fault phenomena, causes and solutions
1, insufficient pressure fault
Fault phenomenon: the water pump is not running, the controller gives an alarm, and the display screen shows that the fault code is insufficient pressure.
Reason for failure:
A) the pipeline is short of water, and the pressure gauge shows that the pipeline water pressure is insufficient.
B) pressure switch failure.
C) There is a lot of air in the pipeline system.
Solution:
A) water supply pipeline is short of water; If the pipe leaks, try to stop it.
B) check with a multimeter. If the pressure switch is not connected, replace the pressure switch; If the contact is poor, reconnect; If the line is open, replace the wire; If you insert the wrong terminal, please press the correct connection.
C) Drain the piping system.
2, pipeline water shortage fault
① Fault phenomenon: the water pump does not operate, the fan does not operate, the controller gives an alarm, and the fault code displayed on the display screen is water shortage in the pipeline.
Reason for failure:
A) the water pump power cord falls off
B) the water pump is not locked for a long time.
Solution:
A) Use a multimeter to check whether the output power of the water pump is normal and whether the contact is good. If the controller has no voltage output, it is a controller failure, and the controller is replaced; If the controller has voltage output and the water pump has no electricity, it means that the connector has fallen off, poor contact or broken wire; If you drop it, contact me again. If the contact is not good, I will contact you again. If the wire is disconnected, it will be replaced.
B) If the water pump has voltage input, it may be locked. Unscrew the screw on the water pump and turn the shaft of the water pump with a screwdriver to make the rotor of the water pump rotate and return to normal; If the water pump is not locked, use a multimeter to detect the open circuit or short circuit of the water pump, indicating that the water pump is burnt out and needs to be replaced.
② Fault phenomenon: the water pump is running, the fan is not running, the controller gives an alarm, and the display screen shows the pipeline fault code.
Reason for failure:
A) The air in the water pump is not exhausted, which leads to the idling of the water pump.
B) The distributor of the heating system is not opened or the filter is blocked.
C) there is air in the pipeline.
D) water flow switch failure.
E) The pressure difference generated by the pipeline of differential pressure machine is not enough.
Solution:
A) Unscrew the slotted copper screw on the end face of the water pump, exhaust the air in the water pump, and restart.
B) If the distributor of the heating system is not opened, the distributor is opened; If the filter is blocked, remove the filter, rinse, install, replenish water and exhaust, and restart.
C) If there is air in the pipeline and it is not exhausted, restart it after exhausting.
D) water flow switch fault with multimeter to detect whether there is a switch signal output in the operation. If there is a signal output, the water flow switch is connected, maybe the connector is not connected properly, or the wire is disconnected, then connect the connector or replace the wire; If the wires and connectors are in good condition, the controller is faulty and replaced. If there is no signal output, the water flow switch is stuck or the waterway is blocked; If water flow switch gets stuck, remove the water flow switch, rinse it and put it back in its original place; And hydration. Exhaust and restart; Waterway blockage should be handled according to method B.
E) Install a distributor (switch) at the heating outlet and turn it down.
3, fan wind pressure fault
① Fault phenomenon: the fan is not running or running slowly, the controller gives an alarm, and the display screen shows the fan wind pressure fault code.
Reason for failure:
A) The fan is stuck or burnt out;
B) poor contact of the connector
C) controller failure
D) capacitor damage
E) the main pressure is too low.
Solution:
A) Check the fan with a multimeter, replace the fan when disconnected, and replace the fan when stuck.
B) The connector is poorly contacted and reconnected.
C) If the controller fails, replace the controller.
D) If the fan impeller can be started by hand, the capacitor will be damaged and need to be replaced.
E) install the voltage regulator and increase the power supply voltage to 220V.