Health & Home RCT-MLT-HNG, Troubleshooting Manual

Thermostat Feature

When the WSK-MLT is in Thermostat mode, an "F" or "C" will flash

Fig. 4

in the upper right corner of the LCD display on the wall LED control
panel switch.  (Fig. 3)

LCD Display

*LCD display not functioning

Fig. 5

If part or all of the LCD display on the wall control panel fails to illuminate,
replace the WSK-MLT
  1. Incorrect wire of the wall switch may be the problem, Verify Wiring

Fan Check 

*Fan will not turn on.  No speed adjustment.

  1. Verify that the WSK-MLT is wired correctly
  2. Verify that there is not a limit switch for the fan installed.
      *Unlike the transitional setup of a GFK-160A fan, the WSK-MLT does 
       not use a fan limit switch and is not plugged into the junction box.
       The fan is plugged into the WSK-MLT receptacle plug labeled "Fan."
 3. Verify middle plug on the receiver is label "fan"  

Fig. 4

  4. Verify Voltage of fan receptacle on the receiver

      Typical fan readings under load

      OFF        - 0 Volts
      Level 3   - 115 +/- 5 Volts

High

      Level 2   - 94 +/- 5 Volts

Medium

      Level 1   - 75 +/- 5 Volts

Low

        Yes, there is  Voltage

        Action:  Replace the Blower (107-500A)

        No, there is no Voltage at fan plug receptacle on the receiver

        Action:  Replace WSK-MLT

*Fan will not turn off

  1. Verify Fan is plugged into the WSK-MLT receiver 
      receptacle labeled fan

Flame Control Check 

(

Authorized Technician only

)

  1. Refer to 

Fig. 6

, verify solenoid wiring the is correct.

  2. Press "FLAME" button on the Wall Switch - flame height will change

  *The flame height doesn't change

      A - Verify that the correct plunger was used, blue for NG, red for LP
      B - Verify the solenoid was installed with a manometer correctly
            High flame 3.5" WC NG and 10" WC LP
     C - Solenoid should make an audible click when the "FLAME" button
            is pressed.
            

Yes, solenoid is good 

             No, solenoid or receiver is bad

     D - Check Orange pigtail wires leads from the receiver with Multi meter
            120v on low flame and 0v on high flame.

Fig. 6

    Yes, the receiver is good

 - Verify the installation of solenoid

             Action: Replace solenoid if installation is correct, 125-510A

            No, replace the WSK-MLT

            Action: Replace WSK-MLT

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