Digital Control Box Replacement

Technical Support Subject Digital Control Box Replacement Document Version Department Revision Details Revised by Tech Engineering Implemented EXT-VR-051 A Tech Document Release SP 27 Aug 2015 JP 27 Aug 2015 N/A 27 Aug 2015 Page 1 of 5 Knowledge Base: www.kb.vmacair.com Email: tech@vmacair.com Web: www.vmacair.com Technical Support: 1(888)241-2289 Toll Free:1(800)738-8622 Fax: 1(877)740-3201 System or Parts affected  All Underhood Systems Except “G” Systems Index System or Parts affected.............................................................1 Overview .......................................................................................1 Control Box Replacement Instructions .....................................1 Pyramid Control Box P/N# 3550704 and P/N# 3550388..........2 Low Profile box P/N# 3550404/Switching Box P/N# 3550412 .2 Replacement Control Box P/N# 3550723 or P/N# 3550727 ....3 Visual Identification .....................................................................3 Pyramid Control Box P/N# 3550704 and P/N# 3550388..........3 Low Profile box P/N# 3550404 .................................................4 Switching Box P/N# 3550412 ...................................................4 Replacement Control Box P/N# 3550723 or P/N# 3550727 ....5 Overview These instructions explain how to update obsolete Control Box’s Control Box Replacement Instructions  Disconnect batteries  Using a small slotted screw driver disconnect green 7 pin temperature probe connector located at base of compressor o If replacing L/P Unit with Switch Box also disconnect green 7 pin connector located under the dash (normally to the right of the steering column)  Disconnect the white 4 pin connector located under dash  Remove obsolete control unit. Either: o Pyramid Control box (P/N# 3550704, 3550388) o Low Profile Control Box and Switching Box (P/N# 3550404 and P/N# 3550412)  Install new Digital Control Box (P/N# 3550723 or P/N# 3550727 depending on system)  Reconnect white 4 pin connector  Route grey wiring with 7 pin connector through firewall and reattach to compressor  Secure all wiring with tie straps and loom keeping wiring away from moving parts and all heat sources  Reconnect batteries Technical Support Subject Digital Control Box Replacement Document Version Department Revision Details Revised by Tech Engineering Implemented EXT-VR-051 A Tech Document Release SP 27 Aug 2015 JP 27 Aug 2015 N/A 27 Aug 2015 Page 2 of 5 Knowledge Base: www.kb.vmacair.com Email: tech@vmacair.com Web: www.vmacair.com Technical Support: 1(888)241-2289 Toll Free:1(800)738-8622 Fax: 1(877)740-3201 Pyramid Control Box P/N# 3550704 and P/N# 3550388 Figure 1 Low Profile box P/N# 3550404/Switching Box P/N# 3550412 Figure 2 Technical Support Subject Digital Control Box Replacement Document Version Department Revision Details Revised by Tech Engineering Implemented EXT-VR-051 A Tech Document Release SP 27 Aug 2015 JP 27 Aug 2015 N/A 27 Aug 2015 Page 3 of 5 Knowledge Base: www.kb.vmacair.com Email: tech@vmacair.com Web: www.vmacair.com Technical Support: 1(888)241-2289 Toll Free:1(800)738-8622 Fax: 1(877)740-3201 Replacement Control Box P/N# 3550723 or P/N# 3550727 Figure 3 Visual Identification Pyramid Control Box P/N# 3550704 and P/N# 3550388 Figure 4 Technical Support Subject Digital Control Box Replacement Document Version Department Revision Details Revised by Tech Engineering Implemented EXT-VR-051 A Tech Document Release SP 27 Aug 2015 JP 27 Aug 2015 N/A 27 Aug 2015 Page 4 of 5 Knowledge Base: www.kb.vmacair.com Email: tech@vmacair.com Web: www.vmacair.com Technical Support: 1(888)241-2289 Toll Free:1(800)738-8622 Fax: 1(877)740-3201 Low Profile box P/N# 3550404 Figure 5 Switching Box P/N# 3550412 Figure 6 Technical Support Subject Digital Control Box Replacement Document Version Department Revision Details Revised by Tech Engineering Implemented EXT-VR-051 A Tech Document Release SP 27 Aug 2015 JP 27 Aug 2015 N/A 27 Aug 2015 Page 5 of 5 Knowledge Base: www.kb.vmacair.com Email: tech@vmacair.com Web: www.vmacair.com Technical Support: 1(888)241-2289 Toll Free:1(800)738-8622 Fax: 1(877)740-3201 Replacement Control Box P/N# 3550723 or P/N# 3550727 Figure 7