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OPERATION
Emergency Indication of Operating Conditions
The ECS system is equipped with an emergency indication via
LED's on the Programmable Logic Controller "PLC" (E6), illust.
Z21753.
In case of a malfunction of the text display in the operator's cab,
the LED's in the fifth column (A13/A7) of the "PLC" indicating fail-
ures in vital operating systems of the Shovel.
The following faults are indicated:
The ECS system is by-passed (By-pass switch S27 actuated)
Start of engine 1 and/or engine 2 blocked, resp. engine shifted to low idle
speed by one or more of the six high pressure filters.
NOTICE
The LED "H31" monitors all six high pressure. Refer to page 217 for
description of the diagnostic codes flashed out by LED "H31".
Coolant pressure
Coolant temperature
Engine oil pressure
Start of both engines blocked, resp. engine shut down,
due to closed main shut-off (gate) valve hydraulic tank
Faulty monitor channel for hydraulic oil temperature
Too low hydraulic oil level! Stop the engines
Faulty monitor channel engine speed
Emergency shut down switch actuated
Engine shutdown from ground man (if so equipped)
*) These LED's are not used.
REMARK
The location of the numbered LED's on the PLC may differ
from that shown in the illustration.
3.7 ELECTRICAL EQUIPMENT IN CAB BASE
Fault:
LED No.:
H30
H31
H32 *)
H33
H34
H35 *)
H36
H37
H38
H39
H112
H116
H135
215
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