Assessments - 3, GPA: 3.7
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The fan blade should snap onto a pin at the base of the shaft. Step 6 Step 7 2-2 203 SCR-6/8 2-5. THERMAL SENSOR REPLACEMENT 1. Remove electrical power to unit. To avoid electrical shock or property damage, move the power switch to OFF and disconnect main circuit breaker, or unplug cord at wall receptacle. 2. Remove the side panel closest to the controls. Step 2 3. Unplug probe from control PC board. 4. Press down on the probe bracket and pull probe from bracket, or using 3/8" socket, remove nut securing probe bracket to unit and remove bracket and probe from unit. 5. Remove vent panels from inside unit. (See Cleaning Section of Operator’s Manual.) Step 3 6. Install new probe in reverse manner, exposing the probe 1.” (38 mm) inside cabinet. 1. inch (38 mm) probe position is important. Improper positioning causes erroneous temperature readings. 7. Plug probe onto P2, a 2 pin connector. Step 6 203 2-3 SCR-6/8 2-6. CONTACTOR 1. Remove electrical power to unit. To avoid electrical shock or property damage, move the power switch to OFF and disconnect main circuit breaker, or unplug cord at wall receptacle. Checkout: 2. Remove the side panel closest to the controls. Step 3 3. Label and remove the wires from contactor. 4 . Perform a check on the contactor as follows: Step 4 Test Points Results from 23 to 29 open circuit from 24 to 28 open circuit from 25 to 27 open circuit from 22 to 26 ohm reading 415 Checkout - power supplied: To avoid electrical shock, make connections before apply ing power, take reading, and remove power before remov ing meter leads. The following checks are performed with the wall circuit breaker closed and the main power switch in the ON position. 5. With power reapplied, let unit start heating up. 2-4 203 SCR-6/8 2-6. CONTACTOR (Continued) Step 7 2-7. DRIVE MOTOR REPLACEMENT KIT Step 4 Step 5 6. Check voltage as follows: Test Points Results from terminal 29 to 28 The voltage from terminal 27 to 28 should read the from terminal 27 to 29 same at each terminal. Replacement: If contactor proves defective: 7. Remove the four screws securing the contactor to the bracket and remove contactor. 8. Install new contactor, replace wires, and replace side panel. 9. Restore power to unit. 1. Remove electrical power to unit. To avoid electrical shock or property damage, move the power switch to OFF and disconnect main circuit breaker, or unplug cord at wall receptacle. 2. Remove rod and discs from unit. (See Cleaning Section of the Operator’s Manual.) 3. From the control side of the unit, remove the right side panel. 4. Cut the three wires from the motor. 5. Using 9/16" socket, remove the bolts securing the motor to the bracket, and pull motor from unit. 1207 2-5 2-7. DRIVE MOTOR REPLACEMENT KIT (Continued) Step 6 Step 8 Step 11 2-8. ROTATION CONTROL SWITCH SCR-6/8 6. Slide extension hub (on motor) into slot on the unit, and bolt the motor to the bracket. Snug, but don’t tighten nuts. 7. Install discs into unit and place rod into place. 8. Adjust motor on bracket so no more than 1/16" (1.6 mm) gap is present and the end of the rod is even all around hub. The rod must not have much “play” in it from the disc hub. The gap between the end of the rod and the hub should not be more than 1/16" (1.6 mm) or damage to rod and disc assembly could occur. 9. Once rod is lined up, tighten nuts on bracket. 10. Splice wires of motor onto the cut wires, according to colors. 11. Remove wires to the drive motor capacitor, mounted under the motor. Remove the capacitor from the unit and replace with the one in the kit. 12. Replace side panel and restore power. 1. Remove electrical power supplied to unit. To avoid electrical shock or property damage, move the power switch to OFF and disconnect main circuit breaker, or unplug cord at wall receptacle. 2-6 1207 SCR-6/8 2-8. ROTATION CONTROL 2. Remove screws securing the side panel closest to the SWITCH (Continued) controls. 3. Remove and label wires from terminals of switch. 4. Take a continuity reading across terminals. If meter shows constant open or closed circuit each time the button is pushed, the switch is defective. 5. For SCR 6, SN: CA0603001 & below SCR 8, SN: CB0602054 & below Unscrew the back ring of switch and pull out switch from the front of the unit. For SCR 6, SN: CA0603002 & above SCR 8, SN: CB0602055 & above Remove the terminal block assembly by inserting a small, flat-head screwdriver in the opening at the top of the switch and prying up, as shown in Figure 1. Make sure the end of the screwdriver pries up on the silver release bar. Unscrew the back ring and pull out switch from the front of the unit. Step 3 Step 5 Step 6 6. Once removed from the packaging, remove the back ring from new switch. 7. Insert the new switch from the front, aligning the arrow on the swtich with the notch in the front panel and then secure the switch to the panel with the back ring. 8. Fit the large notch in the switch onto the “cradle” of the terminal block assembly and snap the two...
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