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Service Manual for VT-DS300SS-2Z and VT-DS300SS-2Z-L 

This wine cooler should be serviced by a qualified technician. 

Be sure to have the unit unplugged while repairing the unit

 

Tools Required: 
1. 

Tool for Electrical Apparatus Troubles: multi-meter, split-core type meter, power meter, Philips 

screwdriver, long flat nose pliers, vice, power board, control board, etc.   

2. 

Tool for Cooling Troubles: suds, brush, R134a gas, nitrogen, oxygen/acetylene soldering set, 

oxygen,  acetylene,  ø6X0.7copper  tube,  ø4X0.7copper  tube,  silver-copper  brazing  alloy,  scaling 
powder, etc. 
 
Troubleshooting & Maintenance: 

I. 

Troubleshooting for Electric Control: 
1. 

Unworking Display. Display does not appear to be working, Display does not appear 
to be working after the appliance is turned on. 
(1) 

Please refer to the clearance procedures below: 

No display in the control panel. 
Check if the electricity is available in the socket. →No. →Repair the socket. 
Yes. →Open the terminal box lid of the medium air duct pane. 
Yes. →Check if the wires of terminals are connected rightly. 
Loose  →Connect  the  terminals  rightly  or  change  it.  →Inspect  it  with  power-on.  →  OK.  → 
Trouble clearing. → Still not normal. 
OK. → Change with a normal control panel. 
Inspect it with power-on →OK. →Change the control panel. → Inspect it with power-on. → OK. 
→ Trouble clearing. → Still not normal. 
Not normal. → Change the PC board. 
Inspect it with power-on. →OK. →Change the PC board. → Inspect it with power-on. → OK. 
→ Trouble clearing. → Still not normal. 
Not normal. → Change the PC board and the control panel. 
Inspect it with power-on. →OK. →Change the PC board and the control panel. → Inspect it 
with power-on. →OK. → Trouble clearing. → Still not normal. 
Not normal. → Check if each 7P terminal is short circuit or open circuit. 
Repair 7P terminals. 
Inspect it with power-on. → OK. → Trouble clearing. → Still not normal. 

 

                                                                                           

 

Summary of Contents for VT-DS300SS-2Z

Page 1: ...cedures below No display in the control panel Check if the electricity is available in the socket No Repair the socket Yes Open the terminal box lid of the medium air duct pane Yes Check if the wires of terminals are connected rightly Loose Connect the terminals rightly or change it Inspect it with power on OK Trouble clearing Still not normal OK Change with a normal control panel Inspect it with ...

Page 2: ...eft side with a Philips screwdriver Check the connecting line box cover 3 Check the connecting line of 7P terminal if loose or broken Connect with the control panel Check the 7P terminal Connect with PC board 4 Check whether the control panel is faulty by replacing it with another new control panel If the display is working normally then the old control panel is faulty New control panel ...

Page 3: ...nel 1 Disconnect all the line terminals inside the connecting line box of the median air duct panel 2 Remove the underneath screws which are fixing the median air duct panel 6 pcs screws 3 Pull out the median air duct panel ...

Page 4: ...er 5 Divide the upper and lower of the median air duct panels Be sure to observe the position of the wires After replacing the control panel fix the wires by aluminum foil paper in the original position 6 Remove the screws 3 pcs which are fixing the control panel with a Philips screwdriver ...

Page 5: ...se sideward After maintenance install the median air duct component as the opposite disassembling procedures 4 Replace the power board Power board is inside of the compressor cabin 1 Remove the fixing screws 2 pcs of the power board with a Philips screwdriver 2 Remove the power board box by hand ...

Page 6: ...an the setting temperature 3 above the compressor does not appear to be working 1 Please refer to the clearance procedures below Unworking compressor Check the control display if working No Inspection procedure as no display troubleshooting Yes Check the compressor power supply Yes Check the starter protector of the compressor if working normally and the coil winding if turned off Replace the dama...

Page 7: ...rmal Still not normal Replace the control panel Inspection with power on OK Replace the control panel Inspection with power on OK Trouble clearing Still not normal Still not normal Replace the PC board and the control panel Inspection with power on OK Replace the PC board and the control panel Inspection with power on OK Trouble clearing Still not normal Still not normal 2 Disassembly of the conne...

Page 8: ...the logical table of the fan operating in the compartment Check if each fan runs seamlessly in the compartment No Check the terminal of the abnormal fan Broken Repair the terminal Inspection with power on OK Trouble clearing No damage Check the voltage of the fan terminal with power on 12VDC Normal Change the fan Inspection with power on OK Trouble clearing No Open the terminal box lid of the medi...

Page 9: ...ble clearing No Check if the setting temperature is higher than 15 No Setting the temperature to 18 Check it after 3 hours with power on OK Trouble clearing Yes Check the fans inside after 1 5 hours No Check the connecting of the abnormal fan Abnormal Repair it Inspection with power on OK Trouble clearing No damage Check input power of the fan 12VDC OK Replace the fan Inspection with power on OK T...

Page 10: ...e value then it s good If the appliance is turned off or has an open circuit the sensor is broken and needs to be replaced Terminal of sensor lead white of defrost sensor lead black of sensor in upper chamber lead red of sensor in lower chamber b The comparison table of temperature resistance value for the sensor Temperature resistance value for the sensor c Position of the sensors The position of...

Page 11: ...eplace with a new one when you determine the sensor is broken 1 Remove the fixing screws 2 pcs of the sensor box cover with a Philips screwdriver 2 Disconnect the line of the broken sensor with scissors then replace a new sensor for the lead connection and then bind up with tape ...

Page 12: ...3 Put the new sensor into the neck of the sensor box 4 Fix the screws to the original position 5 The change of the defrosting sensor 1 Remove all the screws of the air duct panel in the upper chamber ...

Page 13: ...se check it If the door seal is out of shape it could be repaired with a hair dryer If it s broken please change the door seal 2 The problem of the defrosting sensor Deal with the problem as per 4 2 to check and change the faulty defrosting sensor 6 The lights do not work 1 Refer to the clearance procedures below If an individual light does not work please disassemble the lamp panel change the bad...

Page 14: ...tton Lights work Trouble clearing Still not normal Disassemble the top light panel to check if there is voltage output and the terminals are connected well Check if the voltage and the terminals are connected Normal voltage Change the top light panel Inspect it with the power on OK Trouble clearing Still not normal 4 Disassembling inspection for the relative components The light terminals connecti...

Page 15: ...t terminal connected with the next light panel 4 Disassemble 3 screws to remove the light panel and use these 3 screws to fix the light panel after changing the new light panel 5 Install the light cover panel in the reverse order of disassembling it Please flatten out the light cover panel by hand ...

Page 16: ...pe in the compressor welding craters of the return air duct in the compressor welding craters of dry filter in the capillary welding craters of the condensator and transitron welding craters of the exit in the condensator The positions of all the welding craters in the evaporator pipe of the upper chamber s air duct panel Reservoir welding craters of evaporator and return air duct welding craters ...

Page 17: ... duct 2 Weld a new end capping 3 Pour 1 2Mpa dry nitrogen to the end capping check all the welding craters in compressor chamber and evaporators of the air duct with suds to find the leaking welding crater 4 Braze the leaking welding crater after fully draining the nitrogen in the duct replacing with a new dry filter Check again by pouring 1 2Mpa dry nitrogen to the end capping and check all weldi...

Page 18: ...re is nitrogen and pressure in the duct of the capillary entry the welding crater with the dry filter or in the exit condensator and it will spray out oil or water it s because there is greasy or ice blockage in the duct Please pour 1 2Mpa dry nitrogen to the end capping continuously to flush out the oil or ice for over 8 mins Check if there is still oil or water after flushing If yes continue to ...

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