4421 Tradition Trail ● Plano, Texas 75093 ● 972-964-2700 ● 800-836-7472
URL:
www.iscenclosurecooling.com
● Email:
SP-ENG-210-100-09 Rev 1.6
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Note:
Refer to Electrical Schematics for further diagnostics.
Flashing Error
Codes
Single or
Multiple
Codes?
2 +
1
Refer to Alarm Signals
in Digital Temperature
Controller
Programming Section
P1 / P2
combination
flashing?
YES
NO
Potential bad
connection. Check
green connector
behind controller.
CA
YES
NO
Check Low Pressure
Switch Connections
and Verify Pressure
switch is closed. Use
meter.
3
P1 or
P2
NO
YES
Check probe
connections, potential
faulty probe.
LA, LA2, HA,
HA2
YES
Refer to Alarm Signals
in Digital Temperature
Controller
Programming Section
Fuse / Circuit
Protection
Nuisance Trip
Is fuse opening as
soon as unit turns
on?
NO
YES
Check incoming power
supply and connections
for potential short circuit
Does fuse open
when compressor
starts?
YES
NO
Check electrical specification.
Verify proper recommended fuse
has been selected.
Check compressor, if excess heat present compressor may
be faulty. Contact Technical Support.
