WYS SeriesMini Split Indoor Air Handler
Product Information: Disassembly Guide for WYS Series Pioneer
Mini Split Indoor Air Handler
The Disassembly Guide is applicable for models with nomenclature
of WSxxxxMFIxxHLD. The guide provides step-by-step instructions for
disassembling the indoor air handler of the mini-split unit. The
guide is divided into two sections – disassembly of the front panel
and disassembly of electrical parts. The guide provides
illustrations to aid in the disassembly process.
Product Usage Instructions: Disassembly Guide for WYS Series
Pioneer Mini Split Indoor Air Handler
The Disassembly Guide is intended for use by qualified
professionals only. It is important to wear antistatic gloves when
disassembling electrical parts to prevent damage to the parts.
Before disassembling electrical parts, the front panel must be
removed as per the instructions provided in section 1.1.
Disassembly of Front Panel
Step 1: Hold the front panel by the tabs on both sides and lift
it (see Figure 1).
Step 2: Push up the bottom of an air filter (step 1), and then
pull it out downwards (step 2) (see Figure 2).
Step 3: Open the horizontal louver and push the hook towards
left to open it (see Figure 3).
Step 4: Bend the horizontal louver lightly by both hands to
loosen the hooks, then remove the horizontal louver (see Figure
4).
Step 5: Pry the electrical cover open with a screwdriver, and
rotate it towards left, then remove it (see Figure 5).
Step 6: Disconnect the connector for display board (see Figure
6).
Step 7: Slide the front panel side to side to release each axis
(see Figure 7).
Step 8: Open the screw cap and then remove the 3 screws (see
Figure 8).
Step 9: Release the hooks by hand (see Figure 9).
Step 10: Release the 5 hooks in the back (see Figure 10).
Step 11: Pull out the panel frame while pushing the hook through
a clearance between the panel frame and the heat exchanger (see
Figure 11).
Step 12: Release the 5 hooks of the vertical blades, then pull
the vertical blades rightward and remove it (see Figure 12).
Step 13: Remove 1 screw of the display board (see Figure
13).
Step 14: Rotate the display board in the direction shown in the
right picture (see Figure 13).
Disassembly of Electrical Parts
Step 1: Cut the ribbon by a shear, then pull out the coil
temperature sensor (T2) (see Figure 14).
Step 2: Remove one fixing screw of the electronic control box
and two screws used for the ground connection (see Figure 14).
Step 3: An upward force is maintained until the cover of
electronic control box is removed (see Figure 15).
Step 4: Remove the fixed devices of the connectors (see Figure
16).
Step 5: Disconnect the connectors of fan motor, the step motor
and the T2 sensor (see Figure 17).
Step 6: Open the left side plate of electronic control box (see
Figure 18).
Note: The illustrations provided in the guide are for reference
only. Actual unit appearance may vary.
Disassembly Guide for WYS Series Pioneer Mini Split Indoor Air Handler Applies to Models with Nomenclature of “WSxxxxMFIxxHLD”.
1. Disassembly
1.1 Indoor unit
1. Front Panel
Procedure 1) Hold the front panel by the tabs on
the both sides and lift it (see Figure 1).
Illustration
Front Panel
Maintenance and Disassembly
2) Push up the bottom of an air filter (step 1), and then pull it out downwards (step 2) (see Figure 2).
Tab
Figure 1
Filter
Figure 2 Note: This section is for reference only. Actual unit appearance may vary.
Page 1
Procedure
Illustration
1) Open the horizontal louver and push the hook towards left to open it (see Figure 3).
2) Bend the horizontal louver lightly by both hands to loosen the hooks, then remove the horizontal louver (see Figure 4).
Horizontal Louver Hook
Figure 3
Hook
Figure 4
Note: This section is for reference only. Actual unit appearance may vary.
Page 2
Procedure
Illustration
3) Pry the electrical cover open with a screw driver, and rotate it towards left, then remove it. (see Figure 5).
Disassembly
4) Disconnect the connector for display board. (see Figure 6) .
Figure 5
Figure 6 Note: This section is for reference only. Actual unit appearance may vary.
Page 3
Procedure
1) Slide the front panel side to side to release each axis (see Figure 7).
Illustration
2) Open the screw cap and then remove the 3 screws (see Figure 8).
Figure 7
Figure 8
Note: This section is for reference only. Actual unit appearance may vary.
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Procedure
3) Release the hooks by hand (see Figure 9)
Illustration
Disassembly
4) Release the 5 hooks in the back (see Figure 10).
Figure 9
5) Pull out the panel frame while pushing the hook through a clearance between the panel frame and the heat exchanger. (see Figure 11)
Figure 10
Figure 11 Note: This section is for reference only. Actual unit appearance may vary.
Hooks
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Procedure
Illustration
1) Release the 5 hooks of the vertical blades, then pull the vertical blades rightward and remove it (see Figure 12).
Hooks
Maintenance and
Figure 12
2) Remove 1 screw of the display board. (see Figure 13).
3) Rotate the display board in the direction shown in the right picture. (see Figure 13).
Figure 13
Note: This section is for reference only. Actual unit appearance may vary.
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2. Electrical parts (Antistatic gloves must be worn.) Note: Remove the front panel (refer to 1. Front panel) before disassembling electrical parts.
Procedure
Illustration
1) Cut the ribbon by a shear, then pull out the coil temperature sensor (T2) (see Figure 14).
2) Remove one fixing screw of the electronic control box and two screws used for the ground connection (see Figure 14).
Ground Screws
T2 Sensor
Ribbon
Figure 14
Figure 11-1
3) An upward force is maintained until the cover of electronic control box is removed (see Figure 15).
Figure 15 Note: This section is for reference only. Actual unit appearance may vary.
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Procedure
Illustration
4) Remove the fixed devices of the connectors (see Figure 16).
5) Disconnect the connectors of fan motor, the step motor and the T2 sensor (see Figure 17).
6) Open the left side plate of electronic control box (see Figure 18).
Figure 16 Figure 17
Figure 18 Note: This section is for reference only. Actual unit appearance may vary.
Page 8
Procedure
7) Open the two clips on the front of the electric box. (see Figure 19)
Illustration
Maintenance and
8) Open the upper cover plate of electronic control box (see Figure 20).
Figure 19
Figure 20 Note: This section is for reference only. Actual unit appearance may vary.
Page 9
Procedure
Illustration
9) Remove 1 screw and open the 2 clips along the direction indicated in right image (see Figure 21).
10) Pull out the electrical main board along the direction indicated in right image to remove it (see Figure 22).
Figure 21
Figure 22 Note: This section is for reference only. Actual unit appearance may vary.
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3. Evaporator
Note: Remove the front panel and electrical parts (refer to 1. Front panel and 2. Electrical parts) before disassembling evaporator.
Procedure
1) Disassemble the pipe holder located at the rear of the unit (see Figure 23).
Illustration
Pipe Holder
Figure 23
2) Remove the 1 screw on the evaporator located at the fixed plate (see Figure 24).
Screw
Figure 24 Note: This section is for reference only. Actual unit appearance may vary.
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Procedure
Illustration
1) Release the hook on the evaporator (see Figure 25).
2) Remove the one screw on the evaporator located at the fixed plate (see Figure 26).
Figure 25
3) Pull out the evaporator (see Figure 27).
Figure 26
Figure 27 Note: This section is for reference only. Actual unit appearance may vary.
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4. Fan Motor and Fan Blade
Note: Remove the front panel, electrical parts and evaporator (refer to 1. Front panel, 2. Electrical parts, and 3. Evaporator). before disassembling fan motor and fan.
Procedure
1) Remove the two screws and remove the fixing board of the fan motor (see Figure 28).
Illustration
2) Remove the bearing sleeve (see Figure 29).
Figure 28
Screws
Figure 29
Note: This section is for reference only. Actual unit appearance may vary.
Page 13
Procedure 1) Remove the fixing screw (see Figure 30).
2) Pull out the fan motor and fan assembly from the side.
Illustration
Figure 30
Fixing Screw
Note: This section is for reference only. Actual unit appearance may vary.
Page 14
5. Step motor
Note: Remove the front panel and electrical parts (refer to 1. Front panel, 2. Electrical parts) before disassembling step motor.
Procedure
1) Remove the two screws, then remove the step motor (see Figure 31).
Illustration
Stepping Motor
Figure 31
Note: This section is for reference only. Actual unit appearance may vary.
Page 15
6. Drain Hose
Procedure
1) Rotate the fixed wire clockwise as indicated in the right side image (see Figure 32).
Illustration
Disassembly
2) Pull up the drain hose to remove it (see Figure 33).
Figure 32
Figure 33
Note: This section is for reference only. Actual unit appearance may vary.
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