User manual TOSHIBA MMU-AP0121MH SERVICE MANUAL

[. . . ] A06-002 SERVICE MANUAL <Compact 4-Way Air Discharge Cassette Type> MMU-AP0071MH MMU-AP0091MH MMU-AP0121MH MMU-AP0151MH MMU-AP0181MH · This Service Manual describes contents of the Compact 4-Way Air Discharge Cassette indoor unit. For the outdoor unit, refer to the Manual with FILE No. A03-009, A05-004, A05-015. PRINTED IN JAPAN, Apr. , 2006 ToMo CONTENTS SAFETY CAUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CONSTRUCTION VIEWS (EXTERNAL VIEWS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] (PMV1, 2) Check clogging of indoor/outdoor heat exchangers. Check short-circuiting of outdoor suction/discharge air. (Cause of air volume decrease) Check opening of indoor PMV. Check miscabling of communication line between indoor and outdoor. Check operation error of check valve of discharge pipe. Check mispiping of discharge gas/suction gas main pipe. Check circuit clogging at auxiliary heat exchanger side. (PMV3, SV12, check valve) · Check FS unit. Check clogging of SVD valve and operation error. (SVD/SVS coil miswiring, etc. ) Check wiring between FS unit and indoor unit. (Miswiring, Disconnection, Wiring missing) · Check outdoor power line. · Check outdoor P board (I/F) error. . C. · · · · · · · · · · · · · · · · · · 59 P05 P05 01: Power supply open phase 02: Power supply negative phase I/F Open phase negative phase All stop · Open phase was detected when the power turned on. · Negative phase was detected when the power turned on. Check code Main Outdoor 7-segment display remote Auxiliary code controller Check code P07 P07 01: Compressor 1 side 02: Compressor 2 side Detected position IPDU I/F Check code name Heat sink overheat error Status Error detection condition Check item (position) All stop IGBT built-in temp sensor (TH) was overheated. · · · · · · · · · · · · · · · · · · · · · · Check power voltage. Check clogging of heat sink cooling duct. Check fixation between IGBT and heat sink. (Check screwing and contact. ) Check IPDU error. (IGBT built-in temp sensor (TH) error). Check connection of fan connector and wiring. Check indoor type code (DN=10) and the capacity code (DN=11). Check full close operation of outdoor PMV (1, 2). Check clogging of 4-way valve error circuit. Check capillary clogging of oil return circuit from oil separator. [. . . ] (OK if display goes on. ) 2) Do nothing if data is same as those in the memo. Using temperature setup Check also the contents of the setup data and then change them it to those in the memo. After setup operation, push TEST button to return to the normal stop status. In a group operation, turn off the power supply once, return the group wires between indoor units and CN41 connectors as before, and then turn on power of all the indoor units. [. . . ]