Pioneer WD Series, Service Manual

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Contents
I. Electrical Control of Inverter Air Conditioner ········································································2
1. Main compositions of the electrical control of inverter air conditioner·······························2
2. Wiring of Inverter AC Unit ································································································3
3. Current Flow ······················································································································4
4. Computer Control Function Flow Chart for Inverter AC Unit ············································5
5. Protection and Fault Codes·································································································5
II. Troubleshooting····················································································································8
1. According to the fault code ································································································8
(1) Display E1 or E2: ·············································································································8
(2) Display E6························································································································9
(3) Display E3, E7, E8 ···········································································································10
(4) Display E4························································································································11
(5) Display EC ·······················································································································13
(6) Display EP························································································································14
(7) Display EA·······················································································································16
(8) Display EU·······················································································································17
(9) Display E9 (Firstly display P0 or P9, then change to E9)··················································18
(10) Display E0
、 E5··············································································································20
(11) Display EE ·····················································································································22
(12) Display P0 ······················································································································23
(13) Display P1 ······················································································································24
(14) Display P2 ······················································································································24
(15) Display P4 ······················································································································25
(16) Display P5 ······················································································································25
(17) Display P6 ······················································································································26
(18) Display P7 ······················································································································27
(19) Display P8 ······················································································································27
(20) Display P9 ······················································································································28
2. Other faults ························································································································29
1) The indoor unit works normally but the outdoor unit does not work. ·································29
2) The outdoor unit is stopped when the air conditioner has run for a period of time ·············29
3) The air conditioner is tripped when it is started.·································································30
4) The complete unit does not work ·······················································································30
Appendix 1································································································································31
Appendix 2································································································································34
Appendix 3································································································································36
Cautions on Replacement of PCB Boards··················································································37