Technical Manual
Page 40
6.14 Fault Codes:
In the event of a CX Box ‘Fault’ the CX will
display a fault code. The fault code becomes
an item in the User operational display menu.
If more than one ‘active’ fault occurs each will
be displayed as a separate item in the
operational User menu; press Up or Down to
view all active fault codes or to view the
normal status display.
Fault codes are separated in to ‘A:’ Alarm
(Warning) and ‘E:’ Shutdown Trip.
Compressor initiated fault states are
displayed as part of the normal operational
status display and do not generate fault codes.
Examine the compressor unit to establish the
nature or description of the detected fault
condition.
CX Box Controller Fault Codes:
E:0821
Short circuit, or excessive
current, detected on main T1
controller input(s). Check
analogue sensors or digital
inputs.
E:0506
XPM-Ai4#1 Module short
circuit, or excessive current,
detected.
E:0507
XPM-Ai4#2 Module short
circuit, or excessive current,
detected.
E:0840
XPM-Ai4#1
communications
disrupted or module failure.
E:0841
XPM-Ai4#2
communications
disrupted or module failure.
E:0842
XPM-Di8R4
communications
disrupted or module failure.
E:0836
PLL Unlock; Internal failure or
excessively high external
electrical interference
E:0866
Controller internal power
supply fault
E:5000
Internal memory map error
E:5001
Internal memory failure
