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I need a wiring diagram and flow chart for a unimac dryer

I have power to the machine, and 24 volts to the circuit board at the front of the machine, but it will not start, and the controls, including the LED's are dead. I don't have a wiring diagram or any kind of flow chart.
If there was one with the machine, someone took them. The machine is only about 1.5 years old I think.

This is a Unimac commercial dryer
Model # UTO75NQTB1G1WO1
Serial # 0603000179

Posted by on

6 Suggested Answers

  • 1462 Answers

SOURCE: The Drum on my LG DLE2512W Dryer will not turn

no problem with motor or control board. fault is with the motor capacitor only. this is often attached to the motor or near it. the value of the capacitor will be printed on it (usually about 8uf) and you should be able to source from an electrical spares shop

Posted on May 23, 2007

jsrock516
  • 5911 Answers

SOURCE: WIRING DIAGRAM

The following link explains the proper wiring scheme for installing a 220VAC power cord to an appliance:

http://www.fixya.com/support/r793520-3_prong_4_prong_power_cord_conversion

Make sure you also have a dedicated outlet and power source for your dryer. This means a single outlet with a single circuit breaker. Most homes are constructed this way to ensure safe operation of the appliance and to prevent improper loading. If you have questions, please let me know.

As far as a wiring diagram is concerned, most manufacturers place a schematic drawing inside the operator console of the appliance for troublshooting purposes. I hope this helps.

Posted on Oct 16, 2008

pollyluvpat
  • 103 Answers

SOURCE: samsung front load dryer had a burning smell-it

ck recalls on this issue.
there may be one.
under warranty??
do not buy samsung they are notorious for having problems.
sounds like the heating element and relay may have went out.
however if it does not start up at all it could be the motor itself.

Posted on May 14, 2009

jumptrout51
  • 3361 Answers

SOURCE: Replacing Control Board on Frigidaire model LEQ1442ES0 Dryer

There should be screws on the back side of the top panel that come out. Then the panel will slide out so that you can access the front controls.

Posted on Aug 18, 2009

ginko
  • 19396 Answers

SOURCE: Whirpool GGw9250Pw3 no power on Control Panel Inside light works

Hi.



Please read the Fixya article below explaining how to fix the problems related to control lock on Whirlpool dryers and washers.


The front light lit on my Whirlpool.


Regards.

Posted on Feb 22, 2010

  • 1531 Answers

SOURCE: frigidaire front load dryer won't turn on at all

check the main power and terminal block make sure there is power and no problems with the terminal block.
also a bad thermal fuse can cause a problem with the power check the thermal fuse and make sure they have continuity.the last thing to look at is the main control board these can cost up 150.00 dollars depending on where you get it.Bottm line yes i would say it is worth fixing

Posted on Jul 27, 2010

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1 Answer

Heat not working - I have taken apart whole dryer and tested everything - last is control board?


You need the dryer checked with a volt meter point to point to see where you are loosing the voltage. This must be done with the power on and is dangerous for someone who has no background in this type of troubleshooting. If the unit has a circuit diagram that you can read, you need to check for voltage on the circuit board. This unit operates on 240 volts and can cause serious injury if the powered terminals are touched. If there is voltage on the circuit board that going to the heating element, the board is probably good.
I think you have done about as much as you can, and maybe it is time to call a service company.

Dec 24, 2015 | Kenmore Dryers

Tip

Whirlpool Dryer Various Test Procedures - Part 1


TEST #1 Supply Connections
This test should only be done after confirming proper voltage at the outlet.
1. Unplug dryer or disconnect power.
2. Remove the cover plate from the back of the dryer.
3. Check that the power cord is firmly connected to the dryer’s wire harness.
4. Access the machine control electronics without disconnecting any wiring to the control board.
5. With an ohmmeter, check for continuity between the neutral (N) terminal of the plug and P8-3 (white wire) on the machine control board. If there is continuity, go to step 6. If there is no continuity, disconnect the white wire of the harness from the power cord. Test the continuity of the power cord neutral wire . If an open circuit is found,
replace the power cord. Otherwise, go to step 6.
6. In a similar way, check the continuity between the L1 terminal of the plug and P9- 2 (black wire) on the control board. If there is continuity, go to step 8. If there is no continuity, check the continuity of the power cord for power cord’s L1 wire. If an open circuit is found, replace the power cord. Otherwise, go to step 7.
7. Replace the main harness.
8. Visually check that the P5 connector is inserted all the way into the machine control electronics.
9. Visually check that the user interface assembly is properly inserted into the front console.
10. If both visual checks pass, replace the user interface assembly.
11. Plug in dryer or reconnect power.
12. Perform the Console Buttons and Indicators Diagnostic test to verify repair.
13. If indicators still do not light, the machine control electronics has failed: Unplug dryer or disconnect power.
Replace the machine control electronics. Plug in dryer or reconnect power. Perform the Console Buttons and Indicators Diagnostic test to verify repair.

TEST #2 Machine Control Power Check
This test is used to determine if power is present at the machine control electronics.
NOTE: The drum light is controlled by the machine control on all models.
1. Plug in dryer or reconnect power.
2. Open the door.If the drum light illuminates, then power is present at the machine control, and it is functional. Go to TEST #6. If the drum light fails to illuminate, do not assume the machine control electronics needs replacement. Several conditions may cause the drum light not to illuminate, including a bad bulb. If the drum light does not illuminate, go to TEST #1.

TEST #3 Drive Motor Circuit
This test will check the wiring to the motor and the motor itself. The following items are part of this motor system:
Harness/connection Belt/belt switch Drive motor Centrifugal switch Door switch Machine control electronics
1. Unplug dryer or disconnect power.
2. Access the machine control electronics and measure the resistance across P8-4 and P9-1.
If resistance across P8-4 and P9-1 is in the range of 1 to 6 ohms, replace the machine control electronics.
Otherwise, go to step 3.
3. Check the wiring and components in the path between these measurement points by referring to the appropriate wiring diagram and strip circuit in Section 7.
4. Check the belt switch and drive motor. Access the belt switch and drive motor by removing the front panel/drum assembly. Slowly remove the drum belt from the spring-loaded belt switch tension pulley, gently letting the belt pulley down.
5. Remove the white connector from the drive motor switch.
6. Check for the resistance values of the motor’s Main and Start winding coils. NOTE: Main and Start winding coils must be checked at the motor.WINDING RESISTANCE ω CONTACT POINTS OF MEASUREMENT
MAIN 1.4–2.6 Blue wire in back at pin 4 and bare copper wire on pin 5 of black drive motor switch
START 1.4–2.8 Blue wire in back at pin 4 and bare copper wire on pin 3 of black drive motor switch. If the resistance at the motor is correct, there is an open circuit between the motor and machine control electronics.
Check for failed belt switch. If the Start winding resistance is much greater than 4 ohms, replace the motor.
7. Check the belt switch by measuring resistance between the two blue wires while pushing up the belt switch tension pulley.If the resistance reading goes from infinity to a few ohms as pulley arm closes the switch, belt switch is OK. If not, replace the belt switch. If belt switch is OK and there is still an open circuit, check and repair the wiring harness.
8. Door switch problems can be uncovered in the Door Switch Diagnostic Test; however, if this was not done, the following can be done without applying power to the dryer. Connect an ohmmeter across P8-3 (neutral, white wire) and P8-4 (door, tan wire).With the door properly closed, the ohmmeter should indicate a closed circuit
(0–2 ohms). If not, replace the door switch assembly.

on Apr 11, 2009 | Whirlpool LER4634J Electric Dryer

1 Answer

What is Code p2 on a Kenmore electric dryer?


error code indicates that the electronic control board detects an open thermistor (temperature sensor). This is usually caused by a failed thermistor. It can also be caused by a wiring problem or a failed control board.

To troubleshoot this problem, follow these steps:

Unplug the dryer to completely disconnect electrical power. Shut off the gas supply.

Remove the bottom front service panel as shown in the first image below.

Locate the thermistor on the blower housing. The second image below shows the thermistor. It should have a red/white and a black wire attached to it. Pull at least one wire off and measure the resistance across the leads of the thermistor using a volt/ohm meter. You should measure about 10K ohms (10,000 ohms) of resistance at room temperature. If you measure infinite resistance or get much different reading, then the thermistor will need to be replaced. Even if the thermistor reads the correct resistance at room temperature, it could still be defective and giving a bad resistance reading at higher temperatures.

If you suspect that the thermistor is good, check the wiring connection at the main control board (black and red/black wires on the P2 connector). The procedure for accessing the control board is shown in the third image below. With the dryer still unplugged, pull the P2 connector (see diagram of board) and check the resistance through the black and red/white wires. NOTE: The wires down below at the thermistor must be properly attached back onto the thermistor to properly check this circuit. If you get a much higher resistance (or infinite resitance indicating an open circuit) when measuring this circuit from the wires at the control board, then you could have a wiring failure that is causing your problem. If the resistance is the same, I recommend replacing the thermistor and testing the dryer to see if it operates properly.

If you still get the error code after changing the thermistor, then the control board will need to be replaced.

Mar 22, 2015 | Kenmore Dryers

1 Answer

Samsung Dryer Issue


Is this Dryer in the US? It sounds like it may be as you are refering to a Phase Voltage of 120 volts and a Line Voltage of 240 v.
therefore it sounds like your machine is 3 Phase and in the past you have been wired as 3 Phase and Neutral (4 Pin), it could be that your 3 pin socket at the new location is only 3 Phase ( no Neural ) in which case you may have applied twice the voltage to the control circuit which should be only 120 volts in your case, check on the PCB of the control circuit for any fuse which may have operated, otherwise there may be power supply issues due to applying over voltage in the absence of a Neutral :-(

Feb 21, 2015 | Samsung DV218AEW Front Load Electric Dryer

1 Answer

How to wire a MY2NJ 110V relay


http://www.instructables.com/id/Space-heater-controlled-by-digital-thermostat/step2/Schematic/ The transformer in this diagram is a little high on the voltage side. Your relay uses 24 Volts.

Dec 13, 2014 | Dryers

1 Answer

How to trouble shoot the fan after it was exposed to spikes in the power supply


You have an owners manual with a trouble chart
to follow?

If you pay for service, they won't come for two weeks,
& then leave for a week, until the parts come in

The parts come in one day ,they come back in one week with
them,now you got no dryer for three weeks

Need to diagnose this yourself

If you have the manual & wiring diagram, you may have
to test down to the circuit control board, as I did with a
washer, not a year old

I had no power spike & it failed & all tests passed in the
diagnostic manual,just had to go for the board

Doubt the fan is ruined from the power company issue

The electronics are more likely

Nov 25, 2014 | Dryers

1 Answer

Amana ALE643RBW Dry will not start. I checked the thermal fuse and the high limit thermostat both read 0 to 4 back to 0 ohms. It was jumping around back and forth. Checked the heating coil it read 10...


Hello Dale,

Having checked the thermal fuseto be good i will give you a partial list other things that could make the dryer not start

start switch

door switch

timer

circuit breaker, use your meter set to volts ac and check for 240 vac at the outlet,if 240 not at power outlet check for burnt connection inside outlet or bad circuit breaker

if 240vac at outlet check for 240 vac at terminal block on back of dryer where cord connects,if 240 at outlet but not terminal block replace cord , if burnt connection at terminal block,replace cord and block

finally the motor,manufactures do not publish wiring diagrams online and the only way for me to tell you to use jumper cord to check motor is find the wiring diagram inside of control panel and place one wire on the terminal indicated as neutral on wiring diagram and one wire on terminal indicated on diagram as run winding

firstly though check door switch to have contunity (0 ohms) and the start switch to have (0 ohms)WHILE PUSHING IT IN(the start switch isa momentary contact switch and will only have contunity while its pushed in)
to check timer again use wiring diagram and find chart that shows various cycles and with timer set to a cycle the two wires is says will have contunity will be indicated by a solid black line on the diagram

Good luck, Gene

Jul 26, 2011 | Dryers

1 Answer

Dryer is blowing cold air and light is not coming when the door is opened


Hi! browneyes11
Can you use a Volt meter and are you comfortable working on a live circuit? Electric dryer have 240 Volts on a lot of the circuits. There is a wiring diagram inside the machine, If you can follow this I may be able to help you?
InMrFixIt

Aug 25, 2008 | GE DBSR453EBWW Electric Dryer

1 Answer

MY LG DLE5977 Electric Dryer will not power on


Check the junction connection behind the dryer where the power cord and terminal block to make sure that the screws are tight.  Then use a volt meter to check for voltage.  The 2 outside wires should be hot leads and the center is neutral.  Check hot to hot and you should get 240 volts.  Check hot to neutral and you should get 120 volts.  If you get those voltage readings, then you have a control board malfunction and needs to be replaced.  There is no reset switch within the dryer for the control board. 

Jun 09, 2008 | LG DLE5977 Electric Dryer

1 Answer

No Power to dryer


The first thing you need to check is the breaker. turn all the way to off then back to on. Next you need to make sure there is power to the appliance, a volt meter is crucial for this. If you have no access to one, unplug the cord from the wall, remove the little plate on the back of the dryer where the cord attaches. Look at the connections. If all is good and you can check for power all the way to the connections behind the plug, then the control board may have a fuse designed in it. This is a new machine, and they all have circuit boards. The board will be on underneath the top where the controls are. If you can or know someone who can read a wiring diagram, he/she can look at the one on your machine and tell if there is a fuse.

Dec 19, 2007 | Dryers

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