ComNav Commander P2 & P2VS Installation & Operation Appendices
Document PN 29010074 V4.1 - 195 -
Appendix 3
Error Messages
There are a number of different error messages in the P Series autopilot system. These
messages are displayed on the Control Head screen, and are usually accompanied by an
audible alarm.
Critical Errors
The following messages indicate a serious problem. Operation of the autopilot cannot
continue until the problem is resolved.
Message Description
AUX.STATION ERROR
One or more of the auxiliary Control Heads or
Handheld Remotes connected to the SPU can not be
used in the P Series system.
Typically, this is caused by using Heads or Remotes
with firmware versions that are too much older than the
SPU’s, and hence incompatible with it.
Contact your ComNav Dealer for a Firmware
Upgrade.
BATTERY TOO HIGH
Battery voltage has risen above ~40 VDC.
Check all wiring and charger systems.
FAULTY HEAD
The main Control Head is not responding to the SPU.
Check all wiring.
FUSE F2 FAULTY
Fuse F2 on the SPU has blown. This fuse supplies
current to the drive outputs.
Check all wiring and verify that all output loads
(solenoids, pump motors, etc.) are within the
specifications given for the SPU.
Replace the fuse with the same type only.
LOW BATTERY
The autopilot has detected that the battery supply
voltage is less than ~10 VDC, which is too low to
continue safe operation.
Check all wiring and the battery(ies).
ROM ERROR
The autopilot has detected a problem in its program
memory.
Return the unit to your ComNav Dealer for repair.
RFU NOT FOUND
The autopilot cannot detect the presence of a Rudder
Follower Unit
44
.
Check all RFU wiring.
If no faults are found, the RFU may be defective.
Contact your ComNav Dealer for repair advice or
replacement.
Table 14 – Critical Error Messages
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This message does not apply to P2VS systems running with the VFRU feature active.
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