Error Codes - Lennox MCFA Series User Manual

Symptom
Unit not heating properly.
Fan speed cannot be changed.
Wireless remote control signal is not
being trans mitted, even when ON/OFF
button is pressed.
The TEMP adjustment indicator is not
available.
Operation indicator disappears from
the display after a period of time.
TIMER ON disappears from the display
after a period of time.
No tones being sounded by indoor unit,
even when ON/OFF button is pressed.

Error Codes

Indoor units are equipped with a digital display that will display error codes when present (see table below).The error
code will replace the temperature setting displayed on the indoor unit. If more than one error has occurred, the codes will
alternate so that all codes are shown. Reset the display by pressing the ON/OFF button on the wireless remote controller.
Press the ON/OFF button a second time to reapply power to system. If code is still displayed, discon nect and restore
power at the unit disconnect switch or circuit breaker. If the problem was temporary, the code will not reappear. If the
error code reappears after power has been broken and restored at the disconnect switch or circuit breaker, call a licensed
professional HVAC service technician.
Indoor Unit Display
Type
M22A, MMDB,
MCFA, MCFB,
MFMA
Status
dF
Status
CL
Status
CL
Status
CP
Status
FC
Status
FP
Status
nF
Error --
Error
E0
Error
E1
Error
E3
Error
E4
Error
E5
Error
EC
Error
EE
Table 1. Troubleshooting
Possible Cause
• Doors and/or windows are open
• Suction pressure is low due to possible refrig-
erant leak
Check the mode listed on the unit dis play. Fan
speed cannot be changed in the AUTO or DRY
mode
Batteries may have lost their charge
Check the mode listed on the unit dis play.
Temperature cannot be adjusted in the FAN ONLY
mode
Check to see if display reads TIMER OFF
Check to see if display reads TIMER OFF
• Infra-red receiver must be able to see signal
from wireless remote control
• Batteries may have lost their charge
Table 2. Troubleshooting Error Codes
Programmable
Wired
Controller
Optional on
M33C, MWMC,
most Lennox
3WMC
Indoor Units
dF
CL
CL
CP
FC
FP
nF
--
EH 00 E7
EL 01 E1
EH 03 E8
EH 60 E2
EH 61 E3
EL 0C EF
EE
Indoor Unit Error Codes Description
Defrost
Filter cleaning reminder(power on display for 15 seconds).
Active clean
Remote switched off.
Forced cooling.
Heating in room temperature under 8°C.
Filter replacement reminder (power on display for 15 seconds).
Mode conflict for multi-zone systems
Indoor unit EEPROM error
Communication error between indoor unit and outdoor units
Indoor fan speed error (DC motor)
Indoor room temperature sensor error (T1)
Indoor coil temperature sensor error (T2)
Refrigerant leakage detection (Cooling mode only)
High water level alarm
7
Possible Solution
• Close doors and windows
• Check for refrigerant leaks and prop erly charge
system
Fan speed cannot be changed in AUTO or DRY
mode. Change mode to COOL, FAN ONLY or HEAT.
Replace AAA size batteries (2)
Change the mode to COOL, HEAT or DRY
Timed operation is terminated at the end of the
TIMER period
Timed operation is terminated when time period has
expired.
• Aim wireless remote control infra-red transmit ter
directly at receiver
• Replace AAA size batteries (2)