4421 Tradition Trail ● Plano, Texas 75093 ● 972-964-2700 ● 800-836-7472
SP-ENG-211-000-19 Rev 1.0
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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.
