Meyer E-58H, Service Manual

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ELECTRONIC TROUBLESHOOTING E-78 & E-88
TIMEOUTS: The RCM will power off after 2 hours
of inactivity. This conserves battery life if the unit is
accidentally left on when driver leaves. This should
provide ample time to transport between jobs or just
to stop for lunch, etc. Simply pressing any button can
reset this timer.
The Plow lights will remain powered on if there is a
loss of communications. The moldboard functions
will be disabled during this time. This can occur for a
couple of different reasons:
1. If the Meyer accessory port plug is accidentally
pulled out before the RCM is powered off normally.
2. If there is a real loss of communication between the
PCM, HCM and RCM.
Overcurrent: The hydraulic unit will be shut down if an
overcurrent situation occurs for more than 2 seconds.
An alarm will sound and “Overcurrent” will appear
on the display. This might happen when the blade is
taken to full stops in any direction and held. “Stacking
snow” is one reason this may occur. To reset, simply
release the button and press again. If the fault occurs
again the hydraulic unit will be shut down again.
Alarms/Faults: All faults will sound an alarm. To
extinguish the alarm, press any button. To remove
fault from the screen, press the
Exit button to return to
normal screen. The fault will remain in the diagnostic
menu until it is cleared. All moldboard functions will
remain active during the alarms, unless perhaps it is
a bad solenoid. Example: A bad “B” solenoid, then
the moldboard cannot be moved Up, but Left, Right,
and Down are still available.
4. TROUBLESHOOTING DIAGRAMS
RCM will not power On
Plow Lights do not follow OEM switch positions
(RCM and PCM are connected correctly and are
working)
RCM Display shows Dark Lines, Updates slowly
4.0 Troubleshooting Flow Diagrams
Press
Green
button > 1
sec ?
Press green button
for 1 second
No
RCM will emit the
triple beep at
power on even if
the button click is
turned off through
the menu
Power
getting to
RCM ?
Check all electrical
connections
Power cycle RCM
No
Yes
RCM will not power ON
Replace RCM
Yes
Is HCM
connected
securely
and
correctly?
Are voltage
levels
correct?
(refer to
manual)
Does HCM
icon
appear on
RCM
display?
Replace HCM
Yes
Yes
Yes
Clean and tighten
connections
No
Power cycle HCM
No
If after power
cycle, still no icon.
Replace HCM
Plow Lights do not follow OEM switch postions
(RCM and PCM ARE connected correctly and are working)
RCM Display shows Dark Lines, Updates slowly
BLade,
Lights
working
normally ?
LCD display is
cold. This should
cause no
functional problems
An LCD display will
not update/refresh
itself very quickly in
cold weather. All
blade functions
should be normal.
The information on
the screen may be
slow to keep up
with the action
though.
Allow the RCM to
warm up.
Yes
Power to RCM was
disconnected
abnormally. Power
cycle the RCM,
verify secure
connections to
RCM and cigar
accessory jack.
No