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TABLE 20. Outdoor Control 7-Segment Display Alert Codes and Inverter LED Flash Codes
NOTE - System fault and lockout codes take precedence over system status codes (cooling, heating operating percentages or defrost/dehumidi-
cation). Only the latest active fault or lockout codes are displayed (if present). If no fault or lockout codes are active, then system status codes are
displayed. Alert codes are also displayed on the S30/S40 thermostat.
Alert
Codes
Inverter
Code
Inverter LED Flash
Code (number of
ashes)
Priority Alarm Description Possible Causes and Clearing Alarm
Red LED
Green
LED
E 430 26 2 ashes 6 ashes
Moderate /
Critical
Compressor start failure.
If condition is detected, outdoor unit will stop (compressor
and fan). Antishort cycle is initiated. If condition occurs 10
times within an hour, system will lock out.
Indicates poor connection at compressor harness,
improper winding resistance, locked compressor rotor, or
ooded compressor.
To clear, disconnect power to the indoor unit (24VAC
power source to the outdoor control) which will power
o the outdoor control and will open the outdoor unit
contactor, which interrupts power to the inverter and then
re-apply power.
E 431 27 2 ashes 7 ashes
Moderate /
Critical
Error occurs when PFC
detects an over-current
condition of 100A, the
control will display a
moderate code. If condition
is detected, outdoor unit will
stop (Compressor and fan).
Anti-short cycle is initiated.
Inverter is unavailable
to communicate with
the outdoor control for 3
minutes. If condition occurs
10 times within a 60 minute
rolling time period, system
will lock out and display a
critical code.
Issues:
(1) Indicates power interruption, brownout, poor electrical
connection or loose inverter input wire.
(2) System testing was set up and code was generated
when the reversing valve is de-energized coming
out of defrost (code appears with or without 30
compressor delay).
Corrective Actions:
(1) Check for proper main power to outdoor unit and for
any loose electrical connections.
E 432 28 2 ashes 8 ashes
Moderate /
Critical
The inverter has detected
a DC link high voltage
condition.
Error occurs when the DC link capacitor voltage is greater
than 480VDC. If condition is detected, outdoor unit will
stop (compressor and fan). Antishort cycle is initiated. If
condition occurs 10 times within an hour, system will lock
out. System will stop. To clear, disconnect power to the
indoor unit (24VAC power source to the outdoor control)
which will power o the outdoor control and will open
the outdoor unit contactor, which interrupts power to the
inverter and then re-apply power.
E 433 29 2 ashes 9 ashes
Moderate /
Critical
The inverter has detected
a compressor over-current
condition
Error occurs when compressor peak phase current is
greater than 28A. Inverter will issue code 14 rst and slow
down to try to reduce the current. If the current remains
high, outdoor unit will stop (compressor and fan).
Antishort cycle is initiated. If condition occurs 5 times
within an hour, system will lock out.
To clear, disconnect power to the indoor unit (24VAC
power source to the outdoor control) which will power
o the outdoor control and will open the outdoor unit
contactor, which interrupts power to the inverter and then
re-apply power.
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