Japanese osaka gas heater error 12

[rashiduop]

Plz turn heater on back. Where u wl see a metal filter. Open it clean and wash this filter and place again. The error 12 should be resolved. Thanks

[pwuser164139984387]

Salam. Ejaz Sb, still waiting for your response please.

[mustafakhalil16105]

اپنا نمبر ہے نیچے میں نے سروس کرنے کے لیے اس ہیٹر میں بلور لگایا جس کے بعد ایرر 62 اگیا اب موٹر نہیں چل رہی مارکیٹ میں موٹر دستیاب نہیں کیا اس کی موٹر کو وائنڈ کیا جا سکتا ہے اور بہت مہنگی ہے اگر مل بھی جائے تو

03212065057

[Ijaz_Ahmed]

When power is suddenly cut, gas is cut automatically & heater turns off. No burning inside, but lot of heat. There's no need to turn off gas valve if power is suddenly cut.

Always install these heaters on a UPS connection.

[Ijaz_Ahmed]

Sorry for late reply. If heater can not sustain flame (gas burning) then it turns off & power button light blinks. It is usually due to very low gas pressure of faulty gas control valve (blocking the gas). This valve is inside the heater.

Other possibility is that there's some connection problem in the heater power cable. Maybe power is disconnected & reconnected due to a lose connection.

[Ijaz_Ahmed]

What is the price of the motor ?

[Ijaz_Ahmed]

If you want to clean these heaters using a blower, you must prevent the heater's fan from rotating. Insert a long screwdriver into the axial fan of the heater to block it from rotating.

Otherwise you will end up damaging your motor. This motor is encapsulated in molded epoxy, though not easy to open or repair but I have repaired many such motors.

[hmabdurraheem]

Assalam-o-Alikum Ijaz Bhai. I need your guidance regarding Osaka Gas heater. Since the start of this season it was giving error 62 randomly on startup. I cleaned the dust, put some drops of machine oil on motor shaft but the thing that keeps it going was just moving the blower a bit. Whenever it gives error 62, I open the front grill, move the blower a bit and heater started normally. Please note that its not like I am pushing the blower to help it start, even after moving the blower, if the blower is stationary, the heater will start normally. With the time it started giving error 62 more frequently as recently it was giving error 62 1 out of 4 times I started the heater. So I disassembled the heater, removed its fan motor (Its DC 6 volts 10 Amps) opened its front cap and removed the rotor. I noticed two things. First, that the bearings were rattling and had play in them. I had some Japanese NMB 608 bearings lying around from a previous heater project, so I got the bearings replaced and new bearings were press fit. Second, I noticed some carbon like coating at some places on the stator fins, I cleaned the fins with a fine grit sandpaper cleaned everything and assembled the motor. Now when I plugged the motor in the heater, following events were happened:

1) Initially when the heater is plugged to the power, the blower immediately started running on full speed even when the heater is off and nothing on display, turning on the heater dose not changes anything and there was no ignition. With the heater plugged out, I pulled the motor jack from the PCB and again plugged the jack and the heater.
2) Now the blower moves for a fraction of second and got jammed as long as the power is provided to the heater. The blower moves freely after plugging out the power.
3) After two or three attempts, the blower now moves freely with hand regardless of power applied to the heater. The blower will not even try to spin and I am getting error 62.

Now based on your experience, I need your guidance regarding following points. I will be very much grateful for any help regarding any of the points.

1) Is it a motor issue or a PCB issue?
2) If it’s a PCB issue then can you kindly point out at what component should I start troubleshooting?
3) Can you please guide how can I test this motor. It has five wires coming out of it. I am not sure about which wires to apply power to.
4) If it’s a motor issue, then can you please guide how can I open the motor ( the winding side) and what component should I start troubleshooting?
5) the only things I noticed on the PCB are the burnt looking film filter capacitor and missing ZNR, both right beside the main 110v power jack. The heater is powering on normally other than the issue mentioned above. Do they have to do anything with the issue I am experiencing?

Waiting for your helpful response.
JizakAllah Khair

[Ijaz_Ahmed]

Wa Alaikum Salam
This motor 6V10A is a brushless DC motor which has it's controller PCB inside the motor. The motor + control PCB are encapsulated in epoxy material which also acts as the main body of the motor.

Since it's a brushless DC, it is controlled by a controller IC which changes the direction of current by sensing the rotor position via Hall Effect Sensors & tiny magnets on the rotor. All this stuff is encapsulated in the the epoxy.

This is surely a problem of the motor, not the main board. Unfortunately this motor can't be tested by simply applying power. It needs some kind of command from the main board ( like RPM, direction etc.). You need to know the Brushless motor control IC number, read datasheet, find correct connections (decode the 5 wires) and maybe you can use Arduino board to make some test setup.

I have a motor which I opened and will check the possibility of how a test setup can be made.

99% chances that your motor PCB has problem. What is your city/location ?

[hmabdurraheem]

JizakAllah Ijaz Bhai for your guidance and detailed explanation of the problem. I live in Engineers Town Lahore (adjacent to Valancia & Wapda Town). I am going to carefully pry open the motor from the winding side so that the motor PCB and IC are exposed for troubleshooting. I will update and will need more guidance when the motor is open.

[Ijaz_Ahmed]

PM me your contact number & I will share few pictures of the opened motor. That might help you while you attempt to open yours.

You will need a heat gun to soften the epoxy, some small grinding tool, knifes etc.

[pwuser171217779290]

Hello there.
Are you available ?