E-29 Service Mode Cannot Be Selected - Komatsu PC88MR-10 Shop Manual

40 Troubleshooting
Troubleshooting of electrical system (E-mode)

E-29 Service mode cannot be selected

Failure Service mode cannot be selected.
Operate the following switch operations, then service mode is displayed.
Related
Operation of switches: [4] + [1]o[2]o[3] (While pressing [4], press [1], [2] and [3] in this
information
order.)
No. Cause
Defective machine
1
monitor
40-418
Procedure, measuring location, criteria, and remarks
Machine monitor may be defective. (Since this is an internal defect,
troubleshooting cannot be performed.)
(PC88MR-HB1-400-A-Z0-A)
PC88MR-10