Installation Manual

14
TROUBLESHOOTING INFORMATION: UNITARY DIAGNOSTIC CODES
• Air conditioner/heat pump fails to
operate.
• Integrated control module
diagnostic/status LED display shows
the indicated code.
BLANK d 0
• Data not yet on
Network
• Air conditioner/ heat
pump is wired as part of
a communicating
system and
integrated control
module does
not contain any shared
data.
• Verify system type
(communicating or legacy)
• Populate shared data
using memory card
• Wire system as legacy
system
• Turn power OFF prior to repair.
• Use memory card for your specific
model.
• Insert memory card BEFORE
turning power ON. Memory card
may be removed after data is loaded.
Turn power OFF before removing
memory card.
• Error code will be cleared once
data is loaded.
• Air conditioner/heat pump fails to
operate.
• Integrated control module
diagnostic/status LED display shows
the indicated code.
BLANK d 1
• Invalid Data on
Network
• Air conditioner/ heat
pump is wired as part of
a communicating
system and integrated
control module contains
invalid shared data or
network data is invalid
for
the integrated control
module.
• Verify system type
(communicating or legacy).
• Populate correct shared
data using memory card.
• Wire system as legacy
system.
• Turn power OFF prior to repair.
• Use memory card for your specific
model.
• Insert memory card BEFORE
turning power ON. Memory card
may be removed after data is loaded.
Turn power OFF before removing
memory card.
• Error code will be cleared once
data is loaded.
• Air conditioner/heat pump fails to
operate.
• Air conditioner/heat pump operating
at reduced performance.
• Air conditioner/heat pump operating
at low stage when e peeled to operate at
high stage.
• Integrated control module
diagnostic/status LED display shows
the indicated code.
BLANK d 2 • System
Mis-Match
• Air conditioner/ heat
pump is wired as part of
a communicating
system and outdoor unit
requires air flow greater
than indoor units
airflow capability.
• Shared data is
incompatible with the
system or missing
parameters.
• Verify system type
(communicating or legacy).
• Verify shared data is
correct for your specific
model repopulate data if
required.
• Wire system as legacy
system.
• Turn power OFF prior to repair.
• Use memory card for your specific
model.
• Insert memory card BEFORE
turning power ON. Memory card
may be removed after data is loaded.
Turn power OFF before removing
memory card.
• Error code will be cleared once
data is loaded.
Digit2 Digit 1
UNITARY DIAGNOSTIC CODES
Symptoms of
Abnormal Operation
Diagnostic/Status
LED Display Codes
Fault Description Possible Causes Corrective Actions Notes & Cautions
Digit3