Diagnosis Of Microcomputer Circuit - Mitsubishi Heavy Industries SRK25GZ-L1 Handbook

20.6.1 Diagnosis of Microcomputer circuit

(1) Confirmation of the error code on the remote
controller (by pressing the inspection switch) and the
inspection display and normal display lamps on PCBs
of indoor/ outdoor units
(P1068 ~ P1072)
(2) Procedures of trouble diagnosis
(P1072 ~ P1087)
(3) When the remote controller indication is nomal but
the compressor cannot operate:(No check indication)
(P1087 ~ P1091)