Related Manuals for KRUEGER Generation 3 PWM
Summary of Contents for KRUEGER Generation 3 PWM
- Page 1 WWW.KRUEGER-HVAC.COM FAN COIL CONTROLS G3 PWM BOARD Fan Coil ECM Controls Installation, Operation, and Maintenance Manual...
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Page 2: Table Of Contents
Fan Coil ECM Control IOM TABLE OF CONTENTS FAN COIL EC MOTOR CONTROL ..............3 G3 PWM BOARD ....................3 BALANCING UNITS WITH EC MOTORS ............3 ADJUSTING EC MOTOR SPEED ..............5 THREE SPEED (ADJUSTABLE) MOTOR CONTROL ........5 2 – 10 VDC PROPORTIONAL MOTOR CONTROL ........6 EC MOTOR TROUBLESHOOTING GUIDELINES ........7 CHECKING EC WIRE HARNESSES ..............9 EC MOTOR AND DRIVER................9... -
Page 3: Fan Coil Ec Motor Control
Mode (OFF) the LED will flash to indicate Normal status. G3 PWM BOARD The “Generation 3 PWM” (G3 PWM) board provides a pulse- Timed Out - (Program Mode) - The PWM board has a time width modulated (PWM) signal to the EC motor to control out function in Program Mode. - Page 4 Fan Coil ECM Control IOM Press Reset button. Connect a voltmeter to test points HORIZONTAL LOW PROFILE PLENUM SIZE 30 FAN CALIBRATION CURVE: TP1 (-) and TP3 (+). Refer to Figure 1. Set voltmeter to DC CONSTANT-RPM EC MOTOR 3 Row, 10 FPI, 1” Throwaway lter volts.
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Page 5: Adjusting Ec Motor Speed
Fan Coil ECM Control IOM 2. Medium Speed Adjust: Set Configuration Switch to ADJUSTING EC MOTOR SPEED MEDIUM SPEED adjust. (See figure B below.) Switches to ON-OFF-OFF-ON-OFF-OFF-OFF-OFF. This section contains instructions for using the G3 PWM board to adjust the EC motor speed for balancing purposes. •... -
Page 6: 2 - 10 Vdc Proportional Motor Control
Fan Coil ECM Control IOM 4. Min Speed Adjust: Set configuration switches to LO/MIN 2 – 10 VDC PROPORTIONAL MOTOR CONTROL SPEED balancing mode. (See figure G below.) Switches to Speed range adjustment for Proportional Control operation. ON-ON-OFF-OFF-ON-ON-OFF-OFF. Minimum (Min) and maximum (Max) speeds are programmed •... -
Page 7: Ec Motor Troubleshooting Guidelines
Fan Coil ECM Control IOM EC MOTOR TROUBLESHOOTING GUIDELINES Ensure motors and blowers are clean as part of normal maintenance. No further maintenance is required for these motors. Warning! Follow standard lock out tag out (LOTO) procedures when performing service on motor or blower. WARNING: Follow standard lock out tag out (LOTO) procedures when performing service on motor or blower. - Page 8 Fan Coil ECM Control IOM TABLE 1 (CONTINUED): EC MOTOR TROUBLESHOOTING GUIDELINES PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION Verify proper voltage and ground at motor driver power terminals. Refer to Motor Voltage or ground loss at motor driver Driver Connections for the EC motor. Motor overloaded - blower binding Clear blockage.
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Page 9: Checking Ec Wire Harnesses
Fan Coil ECM Control IOM CHECKING EC WIRE HARNESSES Use ohmmeter to verify that motor ground wire has continuity from motor case to ground. To check signal wire harnesses: • Remove power from the unit. Unplug signal harness at EC driver and from motor connector at PWM board. - Page 10 Fan Coil ECM Control IOM TABLE 3: POWER CONNECTOR TABLE 4: CON 1, POWER INPUT DESCRIPTION DESCRIPTION Jumper pin 1 to pin 2 for 120 Ground VAC Line Input only Neutral (or Line 2) Chassis Ground Line 1 AC Line (Line 1) TABLE 5: CON 503 (IF PRESENT) MOTOR ENABLE INPUT AC Line (Line 2, Neutral) DESCRIPTION...
- Page 11 Fan Coil ECM Control IOM Constant RPM EC Driver Connections TABLE 9: CON 201, OUTPUT POWER TO EC MOTOR DESCRIPTION PWR/PWM 12 11 10 9 8 7 6 4 3 2 1 4 3 2 1 Constant RPM EC Motor Driver Enable Jumper The Constant RPM EC motor driver (Big Best manufactured) Figure 13 –...
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