Section 2 – SR-2 Hardware Description
SR2 Microprocessor Connector Maps
J1 – 64 Pin Microprocessor/Interface Board Connector
Not serviceable
J2 - 64 Pin Microprocessor/Interface Board Connector
Not serviceable
J3 - Microprocessor Sensor – arranged by use
Pin # Wire # Description
1 RTP-01 Control return air temperature sensor positive (blue sensor wire)
2 RTN-01 Control return air temperature sensor negative (brown sensor wire)
21 RTRP-01 Display return air temperature sensor positive (blue sensor wire)
32 RTRN-01 Display return air temperature sensor negative (brown sensor wire)
24 DTP-01 Control discharge air temperature sensor positive (blue sensor wire)
13 DTN-01 Control discharge air temperature sensor negative (brown sensor wire)
22 DTRP-01 Display discharge air temperature sensor positive (blue sensor wire)
33 DTRN-01 Display discharge air temperature sensor negative (brown sensor wire)
25 CTP-01 Coil temperature sensor positive (blue sensor wire)
14 CTN-01 Coil temperature sensor negative (brown sensor wire)
3 ATP-01 Ambient temperature sensor positive (blue sensor wire)
4 ATN-01 Ambient temperature sensor negative (brown sensor wire)
26 WTP-01 Water temperature sensor positive (blue sensor wire)
15 WTN-01 Water temperature sensor negative (brown sensor wire)
27 ST1P Spare 1 temperature sensor positive (blue sensor wire)
16 ST1N Spare 1 temperature sensor negative (brown sensor wire)
9 DPI-01 Signal from discharge pressure transducer (white wire) (DPT)
10 SPI-01 Signal from suction pressure transducer (white wire) (DPT)
23 FUEL + Optional fuel level sensor
35 FUEL - Optional fuel level sensor
8 8F Optional solid state fuel level sensor
J3 Sensor Harness Connector – shown from pin side
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2-10
31 January 2005
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