PECO II, Inc. NETMACS II Manual
3.2 TROUBLESHOOTING
The appropriate operational checks should be accomplished after any maintenance has been performed.
If a system fault has been identified, refer to the troubleshooting of the system as follows.
Troubleshooting of the system is limited to performing the start-up and operational checks and the
following procedures. If further assistance is required, contact the PECO II Field Service Group at the
numbers listed in the front matter of this manual.
Whenever a malfunction occurs, first look for the obvious fault. Try to find out whether it is caused by the
system or by its environment (e.g. temperature, humidity or monitored source). In addition, there may be
other situations such as:
A. Input Voltage is missing/not at the correct level.
B. Input and Output connections are not securely fastened.
C. Connectors are not secure.
D. Blown fuses.
E. Tripped circuit breakers.
F. Broken wires.
G. Check the indicators on the NetMACS II Control PWB to ensure the correct ones are illuminated and
the timing is correct. Timing should be approximately on one second and then off one second for the
green LED.
1. PicoMACS II Indicators There are two green LEDs located on the front of the PicoMACS II circuit
pack.
L1
CAN Traffic
GRN
Visible through front
cover.
L2
CAN Communications Error
GRN
a. CAN Traffic - Toggles on and off with each receive and send of CAN traffic to the Gateway
when communications are normal. This is typically at a one second on, one second off rate. A
very fast blip of LED1 indicates an attempt of the PicoMACS II to log into the Gateway circuit
pack.
b. CAN Communications Error - Normally off. Upon a CAN traffic error event, LED2 will latch on
and remain on until reset manually. It is used for CAN traffic diagnostics. Toggles on and off
during a CAN controller reset.
2. Gateway Indicators There are seven LEDs on the Gateway PWB, L1 through L7. Their function is
as follows:
L1 Communications
Error
GRN
L2
CAN Communications Error
GRN
L3
CEV Heartbeat
GRN
Visible through front
cover.
L4
+5V Gateway Power
Present
GRN
L5
Ethernet Link Valid
GRN
L6 Ethernet
Transmit
GRN
L7 CAN
Traffic
AMB
Page 26 Issue
16, February 2007
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