SERVICE MANUAL For Universal Cook 'N' Vent Downdraft System. Models 30" UCV30 36" UCV36 45" UCV45

Transcription

1 SERVICE MANUAL For Universal Cook 'N' Vent Downdraft System Models 30" UCV30 36" UCV36 45" UCV45

2 Table of Contents Introduction... 1 Important Safety Instructions... 2 Features... 3 Operation... 4 Care and Cleaning Customer Services... 6 Troubleshooting Installation... 7 Examples of Possible Ducting... 8 Ventilator Performance Calculator... 9 Ductwork Installation Guidelines Technical Information Component Description Control PCB D.C. Motor Motor Step-down Transformer Up Limit Switch Down Limit Switch Interference Switch Trouble Shooting Disassembly Access Cover Lower enclosure front panel Relay Board Lower enclosure, top cover Switch Assembly Step-down transformer Interference Switch Snorkel Assembly Motor Slides Blower assembly and support legs: Wiring Diagram... 41

3 Page 1

4 Page 2

5 Page 3

6 Page 4

7 Page 5

8 Page 6

9 Troubleshooting Installation Page 7

10 Examples of Possible Ducting Page 8

11 Ventilator Performance Calculator Page 9

12 Ductwork Installation Guidelines Page 10

13 Ductwork Installation Guidelines Page 11

14 Page 12

15 Page 13

16 Technical Information PCB Relay For UCV Component Description The PCB relay for the snorkel is a micro-processor based control. Simply stated, the control uses a CPU (central processing unit) to detect Switch status and to apply the appropriate polarity (negative or positive) To the DC motor to run the snorkel in the down or up position respectively. The switches used to signal the CPU are: Up limit switch: closes when snorkel reaches top position. down limit switch; closes when the snorkel reaches the down position. Interference switch: opens when the snorkel travel is obstructed. The snorkel will reverse direction until the switch closes. Once the obstruction is removed, and the snorkel button is pressed, the snorkel will travel in the up direction. Here s how it works: Based upon the status of the 3 switches, the control PCB powers up the DC motor (in the positive or the negative polarity) when the snorkel button is pressed. Example: When the snorkel button is pressed (upward and downward travel): With the snorkel in the down position, the down limit switch (N.O.) is closed; the up limit switch (N.O.) is open; the interference switch (N.O.) is also closed. The CPU detects this combination of switches and applies positive (+) polarity to the dc motor. The snorkel will travel upward. With the snorkel in the up position, the down limit switch (N.O.) is open; the up limit switch (N.O.) is closed; the interference switch (N.C.) is also closed. The CPU detects this combination of switches and applies negative (-) polarity to the DC motor. The snorkel will travel downward. Page 14

17 Snorkel in down position: Ready to travel up Snorkel in up position: Ready to travel down Page 15

18 Technical Information MODELS UCV30 UCV36 UCV45 Voltage 120 V.A.C. Input To Primary Of Stepdown Transformer Input To Wire Connector On PCB 24 V.A.C Output From Secondary Side Of Transformer To PCB 24 V.D.C Output From PCB To Motor 5 V.D.C. Internal Voltage In PCB To Activate Relay Coils 1 V.D.C. Output From PCB To LEDs 2 V.D.C. Output From PCB To LEDs 60 Hertz 15 Amp Circiut Required Installation With Thermador Cooktop With Another Brand Of Cooktop Ventilators VTRl000Q Or VTR600R Remote Ventilators Vtn600cva Integral Ventilator Components Electrical 24 Volt D.C. Motor 120 V.A.C. To 24 V.A.C. step down transformer for motor Down Limit Switch (N.O.) Up Limit Switch (N.O.) Interference Swrltch (N.O.) Relay Board Control Board Mechanical Drive Assembly Left Slide Support Right Sllde Support Adjustment Bracket UCV Description The UCV System Is Comprised Of 4 Sections; The Blower Assembly Lower Enclosure Assembly Counter Trlm Assembly The Snorkel Assembly Page 16

19 Component Description Relay PC The following components are mounted on the relay board; 5 Relays 1 Step-down Transformer 4 Pin Connectors. 1 External Wire Connector There is a step-down transformer on the PCB that receives 120 V.A.C. and steps down to 12 V.A.C. a series of zenner diodes then rectifies these 12 V.A.C. to 12 V.D.C. to activate the five relay coils. The five relays control the following components: Relay # 1 output to motor for up travel Relay # 2 output to motor for down travel Relay # 3 high speed output for motor (vent) Relay # 4 medium: speed output for motor (vent) Relay # 5 low speed output for motor (vent) The four pin connectors are input/output connectors. They are numbered: J2, J3, J4, J6 and supply the following: J2 OUT supplies 24 V.D.C. to motor J3 OUT/IN supplies D.C. volts to LED lights, and supplies input to relay board from control PCB. J4 OUT supplies current to the up/down limit switches J6 OUT/IN supplies 120 V.A.C. to the transformer; the transformer steps down to 24 V.A.C. and sends the current back to the relay board. TERMINAL BLOCK The terminal block has six taps that accept external wire leads. The taps are marked; line, neutral, neutral, high, medium, low, and supply power supply and the three motor speeds. Page 17

20 Snorkel Up/ Down button Blower Controls Control PCB The Control board sends commands to the relay board to operate according to the user's selection. Page 18

21 D.C. Motor The motor is energized by 24 V.D.C. from the relay board. The Volatge is rectified by a series of Zenner diode on the relay board. Page 19

22 Primary (120 V.A.C.) Secondary (24 V.D.C.) Motor Step-down Transformer The motor step-down transformer steps down 120 V.A.C. to 24 V.A.C. The 24 V.A.C. are rectified to 24 V.D.C. to run the motor. Page 20

23 Up Limit Switch Interference Switch Up Limit Switch The Up Limit Switch is a (S.P.S.T.) normally open switch. When the snorkel reaches the upper position, the switch closes a circuit which stops the motor. Page 21

24 Down limit switch Down Limit Switch The Down Limit Switch is a (S.P.S.T.) nomrally open switch. When the snorkel reaches the lowest position, this switch closes a circuit which stops the motor. Page 22

25 Interference Switch Interference Switch The Interference Switch is a (S.P.S.T.) normally closed switch. If an obstruction interferes with the downward motion of the snorkel, the switch opens a circuit that stops the motor. Page 23

26 Trouble Shooting UL C Troubleshooting Testing components: The testing of the following components can be done at the relay board pin connectors. To test up limit switch: 1) Turn off electrical power to the unit. 2) Set the ohmmeter to the rx1 scale. 3) Touch the test leads to the common and the ul terminals on the J4 Pin connector of the relay board. 4) The meter should indicate an open circuit. 5) Press the switch leaf to close the contacts. The meter should indicate a short circuit. Page 24

27 Trouble Shooting C DL J3 To test down limit switch: 6) Turn off electrical power to the unit. 7) Set the ohmmeter to the RX1 scale. 8) Touch the test leads to the common and the DL terminals on the J4 Pin connector of the relay board. 9) The meter should indicate an open circuit. 10) Press the switch leaf to close the contacts. The meter should indicate a short circuit. Page 25

28 Trouble Shooting To test down interference switch: 11) Turn off electrical power to the unit. 12) Set the ohmmeter to the rx1 scale. 13) Disconnect the black/blue wires from the interference switch to the control pcb. 14) Touch the test leads across the black/blue wires. 15) The meter should indicate an open circuit. 16) Press the svvitch leaf to close the contacts. The meter should indicate a short circuit. Page 26

29 Trouble Shooting 24 VAC L N To test the motor step down transformer: 17) Turn off electrical power to the unit. 18) Set the ohmmeter to the RX1 scale. 19) Touch the test leads across the neutral and line terminals on the J6 pin connector of the relay board. 20) The meter should indicate approximately 18 ohms. 21) Touch the test leads across the 24 VAC terminals on the j6 pin connector of the relay board. 22) The meter should indicate approximately 6 ohms Page 27

30 Trouble Shooting + To test motor 23) Turn off electrical power to the unit. 24) Set the ohmmeter to the rx1 scale. 25) Touch the test leads across the - and + terminals on the J2 pin connector of the relay board 26) The meter shovld indicate approximately 6 ohms. Page 28

31 Trouble Shooting LOWER LIMIT SWITCH ADJUSTMENT The height of the snorkel top cap is visible when installed with cooktops that have a higher cooking surface than Thermador. 1) Unplug the power cord 2) Remove the J-Box cover 3) Loosen the adjustment screw and raise the adjustment. 4) Tighten the adjustment screw. Adjustment Screw for lower limit switch Adjustment Bracket for lower limit switch NOTE: To prevent damage to any internal parts, the snorkel should be in the raised position when this adjustment is made. Page 29

32 Disassembly Screw Screw Access Cover 1) Remove two screws as shown in illustration. Page 30

33 Disassembly (4) Lower enclosure front panel 2) Remove 17 screws as shown in illustration. Page 31

34 Disassembly Relay Board 1) Remove J2, J3, J4 and J6 wire connectors. 2) Remove supply wires from terminal block. 3) Remove 4 from hold down brackets. 4) Remove relay board from control box. Page 32

35 Disassembly Lower enclosure, top cover (4) Lower enclosure top cover 1) Remove 10 screws as shown in illustration. 2) Remove 2 screws from side as shown in illustration. Page 33

36 Disassembly Screw Slide switch assembly to the right Switch Assembly 1) Remove 1 screw as shown in bottom of illustration. 2) Slide switch assembly to the right, away from the plastic switch actuator. 3) Slide wire harness out of junction box. Page 34

37 Disassembly (4) Step-down transformer 1) Remove 4 slide screws as shown in illustration. 2) Remove 2 screws and remove motor cover. Page 35

38 Disassembly Switch Interference Switch Interference Switch 1) Remove 4 screws as shown in illustration. 2) Remove wire harness from input board.* * Wire Harness not shown in illustration Page 36

39 Disassembly Snorkel Assembly 1) Remove filtrers as show in Care and Cleaning Section (Page 5). 2) Remove 4 side screws on snorkel. 3) Remove 4 concealed screws. Page 37

40 Disassembly Motor 1) Remove 2 screws as shown in illustration. 2) Slide screw assembly out of guide. Page 38

41 Disassembly Screws (4) Screws (4) Slides 1) Remove 8 screws as shown in illustration. Page 39

42 Disassembly Top Cap Filters Snorkel Blower Assembly Support Leg J-Box Wing Nuts Blower assembly and support legs: 1) Remove 6 wing nuts and brackets to remove blower assembly, as shown in illustration. 2) Remove 4 screws on each level leg to remove legs. Page 40

43 Wiring Diagram Page 41

44 Thermador reserves the right to change specifications or design without notice. Some models are certified for use in Canada. Thermador is not responsible for products which are transported from the United States for use in Canada. Check with your local Canadian distributor or dealer. Thermador, 5551 McFadden Avenue, Huntington Beach, CA For the most up to date critical installation dimensions by fax, use your fax handset and call 702/ Use code #8030. BSH Home Appliances Corporation 5551 McFadden Avenue, Huntington Beach, CA / ECO 5V018U A 2003 BSH Home Appliances Corp. Litho Date 7/03