iHP Manual 129 | P a g e
Troubleshooting
Use below table as an aid in troubleshooting iHP system.
No Output.
All front panel LEDs are OFF.
Is the input wire defective?
Check continuity or measure input
voltage on the iHP input terminal
block. Replace if necessary.
No Output.
Front panel POWER LED is Solid
Red; two other LEDs are OFF.
Is the AC input voltage within
range?
Refer to iHP datasheet for correct
input voltage. Connect to
appropriate input voltage.
No Output.
Front panel POWER LED is Amber;
two other LEDs are OFF.
Have you press the front panel
STBY switch?
Press front panel STBY switch.
No Output.
Modules are grouped.
Do all modules have the same
configurations (discussed on
Section 6)?
Adjust the configurations so as all
modules in each group have the
same settings.
No Output.
All front panel LEDs are GREEN.
What is the module operating
mode?
Read the Module operating mode
by issuing command D3h on
modules.
Digital current source (08h)
operating mode by default has a
0A output.
No Output.
Front panel POWER LED is Solid
Green; OUTPUT LED is Blinking
Green & SYSTEM STATUS LED is
OFF.
Is INH0 pulled to ground or INH1 is
pulled to 5V?
Fail to communicate with the Unit
via Ethernet.
Is the unit set in Static IP Mode?
Correct default static address of
iHP system is 192.168.2.100.
Is your PC used for communicating
with iHP system is set to Static?
Set your PC to static IP.
Is the unit set in DHCP IP Mode?
Find the correct IP address of your
unit by accessing the Router
settings. If you fail to find the
DHCP IP address of the unit, you
have an option to go back to Static
IP default address by pressing the
LAN reset.
Fail to change the Module
Operating Mode of Module from
one mode to another.
Have you send the correct
commands to change the Mode of
Operation?
Refer to Section 4.4 and Appendix
B.3. ISOCOMM command D3h.
Have you send command to
disable the "Write_Protect" 10h of
ISOCOMM?
Refer to Section 4.4 and Appendix
B.3. ISOCOMM command D3h.
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