Saturday, June 11, 2016

Dexter WCAD-Series Vended Washers - Dexter Speed Queen Maxi Load T 600 - Troubleshooting – Error code causes and solutions - Home appliances Repair and service

Category: Washing machine Repair and Service 

Contents of this article 

  • Troubleshooting procedure 
  • Error codes and causes 
  • Solution for Error codes 

Dexter Speed Queen Maxi Load T 600

TROUBLESHOOTING 
Machine does not start
Power Supply
Check these areas: Circuit breakers, Voltage, Power leads, Power connections. Is front display LED showing a dollar amount.
Door Switch
Check for continuity through door switch when door is closed. If no continuity, adjust or replace door switch.
Control Breaker or Fuse
Check 1.5 amp (T-1200. uses 2.5amp) breaker or fuse for continuity. If no continuity, replace breaker or fuse.
Control Transformer
Check voltage output from control transformer for 120VAC. If voltage is incorrect, replace transformer.
Coin Acceptor
Check coin switch to make sure coins trip switch and give continuity across switch when closed. If no continuity, adjust or replace switch.
Check PCB board
Check all wire connections for sure contacts.
Check wiring between PCB
Check data cable phone type connectors unplug and VFD and replug with power removed.
Check Relay PCB
Check all wire connections for sure contact.
Check Door Solenoid
Check that 120 v power is at solenoid after start button is pushed.
Machine will not accept and count coins
Coin Acceptor
Check coin acceptor switch for any type of blockage or damage. Clean, adjust or replace the acceptor.
Power Supply
Check these areas: Circuit breakers, Voltage,Power leads, Power connection
Door Closed Safety Switch
Check door closed switch at door hinge for proper operation.
Door Handle Closed Switch
Check single door closed switch at left side of door handle to close when handle is vertical.
Control Breaker or fuse
Check 1.5 amp (T-1200 uses 2.5 amp) breaker or fuse for continuity. If no continuity, replace breaker.
Main PCB
Replace
No hot water in detergent dispenser
Water Valve Coil
Check coil continuity at terminals and replace if no continuity. 120 V power only on for 20 second in wash bath.
Water Inlet
Check water inlet screens for blockage and clean screens if necessary.
Water
Check to insure that water is turned on and operating.
P-20
Wire Harness Check black & white harness.
Hot water does not enter tub in wash
Water Valve Coil
Check coil continuity at terminals and replace if no continuity. Check for 120 V power from main relay PCB
Water Inlet
Check water inlet screens for blockage and clean if necessary screens
Water
Check to insure that water is turned on and operating.
Blk or Wht wire at main controller
Check black or white wires at Molex plug on PCB at main controller and at relay PCB.
Pressure Switch
Check pressure switch continuity between terminals . If no continuity, check pressure switch hose for obstruction. If hose okay, change pressure switch.
ERROR CODE CAUSES AND SOLUTION 
ERROR CODE F1
The door failed to close and lock or The door failed to remain locked during the cycle.
Check VFD fault code before turning off. Check to hear if door solonoid engaged. Turn off the power to the washer. Check wire connections to door /lock switches. Check wire connections from switches to controller. Check P-4 wire connections at PCB controller. Adjust the door lock mechanism.
ERROR CODE F2
The washer tub does not fill with water within 7 minutes. The wash cycle will continue. The F 2 will flash three times, then wait for 30 seconds. The error will clear
at the end of the cycle. Turn off the power to the washer. Check the operation of the water valves. Check the incoming water pressure. Check for blocked or restricted water flow.
Check to ensure the drain valve is functioning properly. This error will occur on 18# washers when water level is set for high (the pressure switch in 18# washer is only one level).
ERROR CODE F3
Memory error in controller. The memory checksum is wrong.
Check VFD fault code before turning off power. Try to clear the fault with the Palm. Try a soft Reset of the controller with the white button. If problem. Replace PCB controller.
ERROR CODE F4
Washer controller communication error
Check VFD fault code before turning off power. Try the data cable fi rst. Move around cable and remove any side loading tension from data cable connector ends. Check connection P25/24/23 to P15. Turn power back on to the washer. If the problem returns, replace the PCB washer controller.
ERROR CODE F5
Pressure Switch error (only OPL) - when the high level sensor indicates full but the lower one indicates empty.
The wash cycle will continue. The F 5 will fl ash three times, then wait for 30 seconds. The error will clear at the end of the cycle.
Check VFD fault code before turning off power. Check the pressure switch.(Ohm out contacts). Check pressure switch connections to ensure they are all making good contact. Check the Molex type harness connector to ensure no wire been pushed out of the Molex type housing that it is shorting or not connecting.
ERROR CODE F6
Wrong washer size for drive type.
Check VFD fault code before turning off power. If the controller was installed in a different size machine before being installed in this machine, a problem can occur. If someone has been doing repairs on the washer, check for the correct size drive. It can also be caused by pressure switch harness. Check to ensure the correct harness in installed. The control can be reset by holding program button on controller during startup (soft reset). Check orange wire at Molex connector on controller coming from pressure switch or replace pressure switch harness.
ERROR CODE F7
Wrong size drive installed Check VFD fault code before turning off power.Check to ensure all the harnesses are properly connected to the controller. Check to ensure the VFD drive horsepower is proper for this size of washer. The control can be reset by holding program button on controller during startup (soft reset) Check orange wires at molex connector on controller coming from pressure switch.
ERROR CODE F8
The washer tub does not empty within 7 minutes. The wash cycle will continue. The F 8 will flash three times, then wait for 30 seconds. The error will clear at the end of the cycle.
Check VFD fault code before turning off power. Check to ensure the drain valve is operating properly (slow drain has potential to cause this code). Check to ensure the pressure switch tube is clear of any blockage, and the pressure switch is operating properly. Check the pressure switch harness.
ERROR CODE F9
The washer tub does not reach the spin target frequency within 150 seconds. The wash cycle will continue. The F9 will fl ash three times, then wait for 30 seconds. The error will clear at the end of the cycle.
Check VFD fault code before turning off power. Check to ensure the drain valve is operating properly (slow drain has potential to cause this code). Check to ensure the pressure switch tube is clear of any blockage, and the pressure switch is operating properly. Check the pressure switch harness.
ERROR CODE F10
After a spin the washer tub does not stop within 150 seconds. Check VFD fault code before turning off power. Inspect the braking resistors and measure the resistance.
Check connecting wiring from braking resistor to the drive mounted in the top of the washer. Reset the drive and try again. Possibly incorrectly programmed drive.
ERROR CODE F11
The drive size setting has changed.
Check VFD fault code before turning off power. Check to ensure all the harnesses are properly connected to the controller. Check to ensure the drive horsepower is proper for this size of washer. If no one has worked on machine very recently then PCB controller or VFD may need to be replaced. Do a soft reset before and after either VFD replaced.
ERROR CODE F12
Washer controller internal error
Check VFD fault code before turning off power. Turn off the power to the washer. Wait one to two minute. Turn on the power to the washer.
ERROR CODE F13
The variable frequency drive (VFD) and the washer computer are not communicating.
Check the data communication cable between the washer computer and the variable frequency drive (VFD).
Step 1: Make sure the cable did not become unplugged during operation.
Step 2: Make sure that the cable is not being pulled sideways at either the washer controller, or the VFD, plug end. If both ends of the communications cable are plugged in the washer computer and VFD and there is no tension on the communications cable pulling it from side to side, then replace the cable.
Step 3: Inspect both female connection points at PCB controller and at VFD. These may need replacement if they cannot be reset.
ERROR CODE F14
Over-current on the drive or motor.
Step 1: Check to make sure the washer cylinder turns freely by hand. If it turns freely, continue to step 2. If it does not, remove the belt and see if the motor turns freely by hand. If the motor turns freely, then check for obstructions in the cylinder or check the bearings. If the motor does not turn freely, replace the motor.
Step 2: Check the motor wires for a short circuit between leads. If there are motor leads that have conductors touching, separate them and insulate them. If the wires are broken, splice them together or replace the motor.
Step 3: Check braking resistors to see if they measure the correct resistance. If a resistor does not measure the proper value, replace it.
ERROR CODE F15
The variable frequency drive (VFD) senses that the internal voltage is too high. The source of the problem can originate from two different areas.
Area 1: The input voltage can be too high, or there may be a high level of electrical noise.
Area 2: The motor can be generating a voltage that is acting like an input to the VFD output motor terminals.
Step 1: Measure the supply voltage to the VFD on the L1, L2 (or N), and L3 (if connected to three phrase power). the supply voltage should be from 187 to 264 VAC or 108 to 132 VAC for a 120 VAC VFD. Also make sure the supply wires on L1, L2 (or N) and L3 (if connected to three phase power are securely connected.
Step 2: Ch eck the braking resistor connections at the VFD. The terminal screws should be tight. Once of the braking resistor wires should be connected to terminal B2.
Step 3: Measure each braking resistor separately to make sure they are the correct resistance. (200 for 1 and 2 Hp VFD and 160 for 3 Hp VFD).
Step 4: If you have a 240 VAC, high leg voltage supply, try disconnecting the high leg. If this cures the problem, either leave the high leg disconnected, connect a transient voltage surge suppressor (with some form of filtering) at the voltage supply panel, connect a line choke on the high leg or install a VFD filter.
ERROR CODE F16
The temperature sensor inside of the variable frequency drive detects that the internal temperature is too high.
Step 1: Make sure the cooling fi ns on the VFD heatsink and the ventilation louvers on the VFD cooling fan cover are clean.
Step 2: Start a washer cycle and make sure the VFD cooling fan operates after the cylinder starts turning.
ERROR CODE F17
Overload of the drive or motor (Check drive fault code before powering down). Check the washer motor to ensure it turns freely. Check the wiring for loose connections to the drive and motor. Measure the braking resistor values. Check for damaged motor wires. Check V-Belt tension and adjust to 1” deflection at center. Check braking resistors.
ERROR CODE F18
Ground Fault to the drive Check VFD fault code before turning off power. Check the wiring connections to the drive and motor. Check the ground wiring of the drive, motor and incoming connection to ensure a proper ground is present. Check for damaged motor wires.
ERROR CODE F19
Low Voltage to the drive Check VFD fault code before turning off power. Turn the power off to the washer. Check the wiring connections to the drive and motor. If no problem is observed, turn on power to the washer and test.Measure the incoming line voltage.
ERROR CODE F20
Internal drive error Check VFD fault code before turning off power. Turn the power off to the washer. Wait one minute. Turn the power on to the washer. If problem reappears, contact your Dexter representative.
ERROR CODE F21
Data error on communications between the controller and drive Internal drive error # 32. This error also has CEXX errors associated with it that are presented on the drive display.
The CE errors are communications errors. Data Cable noise can cause the majority of these errors.Check VFD fault code before turning off power. Check the data cable between the controller and the drive. Replace data cable if it appears damaged and fault appears again. Please note that this fault will occur if you turned main power off and on too quickly.