System Refrigerant; Charge Mode Jumper - Lennox EL23XCV Series Manual

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/dehumidifi-
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.
Inverter LED Flash
Code (number of
Alert Inverter
flashes)
Codes Code
Red LED
E 441 14 1 flash

System Refrigerant

IMPORTANT
The system must be operating at full capacity during
charging. Using the Charge Mode Jumper on the outdoor
control ensures the unit is running at 100% capacity.
Confirm outdoor unit running capacity.
This section outlines the procedures to:
1 - Connect a gauge set for testing and charging as
illustrated in figure 49.
2 - Check and adjust indoor airflow as described in
figure 50.
3 - Add or remove refrigerant using the weigh-in
method shown in figure 51.
4 - Verify the charge using the subcooling method
described in figure 52.
IMPORTANT: Unit must be operating at 100% capacity to
be charged properly.
ADDING OR REMOVING REFRIGERANT
This system uses HFC-410A refrigerant which operates at
much higher pressures than HCFC-22.
Priority Alarm Description
Green
LED
Compressor slowdown
due to high compressor
current. Compressor
current is approaching limit.
The compressor speed
automatically slows. The
4 flashes Minor
control sets indoor CFM
and outdoor RPM to values
according to demand
percentage rather than
the actual Hz. Alarm is
automatically cleared..
This error code is primarily for informational purposes
as the inverter controls the compressor to operate within
design parameters. Alert code 441 typically occurs at
startup as the compressor as the currently increases
rapidly during startup.
The inverter will reduce the compressor speed by 4
hz and slow the compressor ramp up speed to the
requested compressor demand (capacity). This is normal
and expected operation of the inverter to control the
compressor within design parameters. In most cases the
alert code 441 does not require any additional service or
diagnostic procedures.
E441 may also occur if the system is operating at high
pressures.
This error code is primarily for informational purposes
as the inverter controls the compressor to operate within
design parameters. Alert code 441 typically occurs at
startup as the compressor as the currently increases
rapidly during startup.
The inverter will reduce the compressor speed by 4
hz and slow the compressor ramp up speed to the
requested compressor demand (capacity). This is normal
and expected operation of the inverter to control the
compressor within design parameters. In most cases the
alert code 441 does not require any additional service or
diagnostic procedures.
E441 may also occur if the system is operating at high
pressures.
INDOOR AIRFLOW CHECK
Check airflow using the Delta-T (DT) process using the
illustration in figure 47.
The diagnostic screen on the S30/S40 thermostat dis-
plays the indoor CFMs on systems installed with the S30/
S40 communicating thermostat.
On systems installed with the S30/S40 thermostat, the
Cooling - Maximum Rate Test located in the Test section
of the Dealer Control Center of the thermostat or the Deal-
er Setup App may be used to operate the unit at maximum
capacity during charging.

Charge Mode Jumper

To initiate the EL23XCV Charge Mode function, install the
jumper across the two Charge Mode Pins (CHRG MODE)
on the outdoor control. The Charge Mode can be used
when charging the system with refrigerant, checking the
refrigerant charge, pumping down the system and per-
forming other service procedures that requires outdoor
unit operation at 100% capacity.
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Possible Causes and Clearing Alarm