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| Table 3. Main Control Jumpers and Terminals | |
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Board ID | Label | Description | |
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E12 | PSC Fan | 240 VAC output connection for outdoor fan. | |
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E16 | PSC Fan | 240 VAC input connection for outdoor fan. | |
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| W | 24VAC output for defrost auxiliary heat output. | |
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| L | Thermostat service light connection. | |
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| Y2 | 24VAC thermostat input/output for second stage operation of the unit. | |
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| Y1 | 24VAC thermostat input for first stage operation of the unit. | |
E18 |
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O | 24VAC thermostat input for reversing valve operation | ||
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| DS | Humiditrol Input | |
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| C | 24VAC system common | |
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| R | 24VAC system power input | |
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E21 and E22 | LO−PS | S4 connection for low−pressure switch (2.4 milliamps @ 18VAC) | |
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E31 and E32 | Y1 OUT | 24VAC common output, switched for enabling compressor contactor. | |
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E24 and E25 | HS−PS | S87 connection for high−pressure switch. | |
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E26 | FAN 1 | First Stage and second stage basic and precision dehumidification ECM fan motor 24VDC out- | |
put connection 1. | |||
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E27 | FAN 2 | Second stage basic and precision dehumidification ECM fan motor 24VDC output connection | |
2. | |||
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E28 | FAN C | ECM common connection for ECM fan. | |
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| Six position square pin header E30 provides connections for the temperature sensors. | ||
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| DIS (YELLOW) | DIS 5 | |
| DIS 6 | ||
| Pins 5 and 6 | ||
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| Range is −35ºF to 310ºF. Sensor is clipped on a 1/2" copper tube. | |
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| AMB (BLACK) | AMB 3 | |
E30 | AMB 4 | ||
| Pins 3 and 4 | ||
| Range is −40ºF to +140ºF | ||
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| COIL 1 | |
| COIL (BROWN) | COIL 2 | |
| Pins 5 and 6 | This model does not utilize a coil sensor. The cable harness assembly for the sensors | |
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| incorporates a built−in 10K resistor between pins 5 and 6. | |
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| This jumper allows service personnel to defeat the timed off control, and field programming of | |
E33 | Field Test | unit capacity feature. Placing a jumper across both pins on E33 will terminate the anti−short | |
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| delay. It will also clear lockout alarms | |
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W1 | Short DS To R | Cut for Humiditrol Enhanced Dehumidification Accessory (EDA) applications. | |
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* Factory default setting |
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Page 23
XC17 SERIES