Soft Serve: Troubleshooting Defrost

SS: Troubleshooting Defrost

Troubleshooting :: Soft Serve :: Testing DEFROST Functionality


Introduction

New Spaceman USA C-model machines have a DEFROST function.  This function allows hot gas to move through your refrigeration system and quickly warm the cylinders.  This function can be used when you encounter a freeze up (STOP 1 or STOP 2 Error), and/or before WASH mode when removing product from your machine.  If your machine is having issues with the Defrost mode, please follow the steps below to confirm DEFROST is working correctly in the machine.

Warning:  Operating the machine with the doors off is dangerous.  Please be careful not to place your hands or any objects inside the freezing cylinder when in operation.  Failure to do so may cause severe injury.  
Troubleshooting Steps
  1. Turn the machine power OFF.  If there are multiple flavors, turn power to both flavors OFF.  The following steps will be performed one side at a time.
  2. If possible drain and rinse the machine per the manual instructions, and disassemble the machine.
Warning:  Operating the machine with the doors off is dangerous.  Please be careful not to place your hands or any objects inside the freezing cylinder when in operation.  Failure to do so may cause severe injury.  

  1. Remove the side panels and electrical box panels from the machine.
  2. Turn the machine on and press RESET and then WASH to enter WASH mode (if there are multiple flavors, perform this on one side at a time)
  1. Place an Amp clamp around the motor wire running through the amp sensor on the power board.  Verify the motor amp draw matches the screen within +/- 0.2 A
  2. On the Power board, verify the following LED lights are enabled:  motor relay, agitator relay, and air pump relay.  Those components should also be turned on and operational.
Note: Two lights for each relay should be lit, indicating input and output power from the relay.  If only one light is on, there is an issue with the power board.
  1. Verify the motor is turning in the correct direction, the hopper agitator blade is spinning, and the airpump motor is on.
  1. Press the RESET and then the STANDBY button to place unit into STANDBY mode
  1. On the Power board, verify the following LED lights are enabled:  motor relay, agitator relay, fan relay, and after a few seconds, the compressor relay.  Those components should also be turned on and operational in that order.
  2. Wait 30 seconds to 1 minute and perform a dry freeze test by verifying the cylinder walls get cold and begin to frost up.  The temperature reading on the display board should begin to drop quickly.
  1. Press the RESET button, then press and hold the STANDBY button for 3 seconds to enter DEFROST mode.
  1. On the Power board, verify the following LED lights are enabled:  defrost relay and compressor relay, then after a few seconds the motor relay, fan relay, and agitator relay.  Those components should also be turned on and operational in that order.
  2. Wait 30 seconds to 1 minute and verify the cylinder should warm to 42°F.  The temperature reading on the display board should begin to rise quickly.  Once 42°F has been achieved, the machine automatically will switch into STANDBY mode, and the compressor will begin to cool the cylinder back down again.
  3. Allow the compressor to run for at least one minute, and then press RESET to stop the machine.  If you have reached this stage, the machine, controls, and components are all functioning correctly.

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