Lennox 19V30 Installation And Setup Manual page 76

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
Inverter
Alert Priority
Flash
Code Condition
Code
Service
382
Urgent
400 Service Soon
Information
401
Only-Dealer
402 Service Soon
403 Service Soon
Service
404
Urgent
Service
405
Urgent
Service
406
Urgent
Table 19. Alert Codes and Troubleshooting
Actual Displayed
Alert Text
Under dealer
Component or System Operational State and Troubleshooting Tip
control center >
Notifications
EIM Relay W1 Relay W1 failure (furnace or air handler modes only). W1 relay is energized but input is not
Fault sensed after three seconds.
OD LSOM
The compressor internal overload has tripped.
Comp. Internal
• Thermostat demand Y1 is present; however compressor is not running.
Overload
• Check power to unit.
Tripped
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 flashing LED lights then the unit will
run in low speed;
OD Compressor
Long Run Cycle • 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.
• Either the discharge or suction pressure level is out-of-limits, or the compressor has
OD System
overloaded.
Pressure Trip
• Check discharge or suction pressure.
OD Compressor
The compressor ran for less than three minutes to satisfy a thermostat demand.
Short-Cycling
The compressor rotor is locked up due to either:
• Run capacitor short.
OD Compressor • Bearings are seized.
Rotor Locked
• Excessive liquid refrigerant.
NOTE: May need to install hard start kit.
The compressor circuit is open due to:
OD Compressor
• Power disconnection -
Open Circuit
• Open fuse
OD Compressor
Open Start The required amount of current is not passing through the START current transformer.
Circuit
76
How to clear alert code
Automatically clears when W1 relay
input is sensed.
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.
Automatically clears after 30
consecutive normal run cycles or
power reset.
Automatically clears after four
consecutive normal compressor run
cycles.
Automatically clears after four
consecutive normal compressor run
cycles.
Automatically clears after four
consecutive normal run cycles or
after power reset.
Automatically clears after one normal
compressor run cycle.
Automatically clears after current is
sensed in START sensor, or after
power reset.