Install Instructions

76
Table 19. Alert Codes and Troubleshooting
GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat
Alert
Code
Inverter
Flash
Code
Priority
Condition
Actual Displayed
Alert Text
Under dealer
control center >
Notications
Component or System Operational State and Troubleshooting Tip How to clear alert code
382
Service
Urgent
EIM Relay W1
Fault
Relay W1 failure (furnace or air handler modes only). W1 relay is energized but input is not
sensed after three seconds.
Automatically clears when W1 relay
input is sensed.
400 Service Soon
OD LSOM
Comp. Internal
Overload
Tripped
The compressor internal overload has tripped.
• Thermostat demand Y1 is present; however compressor is not running.
• Check power to unit.
This alert code is automatically
cleared after current is sensed in
both RUN and START sensors for at
least two seconds or after service is
removed, or after power reset.
401
Information
Only-Dealer
OD Compressor
Long Run Cycle
Either the compressor ran for more than 18 hours continuously while attempting to cool the home
during a single demand or the system refrigerant pressure is low.
• Alert code will not lockout system.
• If the two-stage outdoor unit has an outdoor control with ashing LED lights then the unit will
run in low speed;
• An outdoor control with a seven-segment display, the outdoor control will display alert code 401,
but continue to run in high speed.
• If the outdoor unit is a heat pump, and the outdoor temperature is less than 65°F, alert code 401
is ignored.
• Also monitors low pressure switch trips.
Automatically clears after 30
consecutive normal run cycles or
power reset.
402 Service Soon
OD System
Pressure Trip
• Either the discharge or suction pressure level is out-of-limits, or the compressor has
overloaded.
• Check discharge or suction pressure.
Automatically clears after four
consecutive normal compressor run
cycles.
403 Service Soon
OD Compressor
Short-Cycling
The compressor ran for less than three minutes to satisfy a thermostat demand.
Automatically clears after four
consecutive normal compressor run
cycles.
404
Service
Urgent
OD Compressor
Rotor Locked
The compressor rotor is locked up due to either:
• Run capacitor short.
• Bearings are seized.
• Excessive liquid refrigerant.
NOTE: May need to install hard start kit.
Automatically clears after four
consecutive normal run cycles or
after power reset.
405
Service
Urgent
OD Compressor
Open Circuit
The compressor circuit is open due to:
• Power disconnection -
• Open fuse
Automatically clears after one normal
compressor run cycle.
406
Service
Urgent
OD Compressor
Open Start
Circuit
The required amount of current is not passing through the START current transformer.
Automatically clears after current is
sensed in START sensor, or after
power reset.