Lennox MCFA Series User Manual

7
Table 1. Troubleshooting
Symptom Possible Cause Possible Solution
Unit not heating properly.
• Doors and/or windows are open
• Suction pressure is low due to possible refrig-
erant leak
• Close doors and windows
• Check for refrigerant leaks and prop erly charge
system
Fan speed cannot be changed.
Check the mode listed on the unit dis play. Fan
speed cannot be changed in the AUTO or DRY
mode
Fan speed cannot be changed in AUTO or DRY
mode. Change mode to COOL, FAN ONLY or HEAT.
Wireless remote control signal is not
being trans mitted, even when ON/OFF
button is pressed.
Batteries may have lost their charge Replace AAA size batteries (2)
The TEMP adjustment indicator is not
available.
Check the mode listed on the unit dis play.
Temperature cannot be adjusted in the FAN ONLY
mode
Change the mode to COOL, HEAT or DRY
Operation indicator disappears from
the display after a period of time.
Check to see if display reads TIMER OFF
Timed operation is terminated at the end of the
TIMER period
TIMER ON disappears from the display
after a period of time.
Check to see if display reads TIMER OFF
Timed operation is terminated when time period has
expired.
No tones being sounded by indoor unit,
even when ON/OFF button is pressed.
• Infra-red receiver must be able to see signal
from wireless remote control
• Batteries may have lost their charge
• Aim wireless remote control infra-red transmit ter
directly at receiver
• Replace AAA size batteries (2)
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.
Table 2. Troubleshooting Error Codes
Type
Indoor Unit Display
Programmable
Wired
Controller
Indoor Unit Error Codes Description
M22A, MMDB,
MCFA, MCFB,
MFMA
M33C, MWMC,
3WMC
Optional on
most Lennox
Indoor Units
Status
dF dF
Defrost
Status
CL CL
Filter cleaning reminder(power on display for 15 seconds).
Status
CL CL
Active clean
Status
CP CP
Remote switched off.
Status
FC FC
Forced cooling.
Status
FP FP
Heating in room temperature under 8°C.
Status
nF nF
Filter replacement reminder (power on display for 15 seconds).
Error -- -- Mode conict for multi-zone systems
Error
E0 EH 00 E7
Indoor unit EEPROM error
Error
E1 EL 01 E1
Communication error between indoor unit and outdoor units
Error
E3 EH 03 E8
Indoor fan speed error (DC motor)
Error
E4 EH 60 E2
Indoor room temperature sensor error (T1)
Error
E5 EH 61 E3
Indoor coil temperature sensor error (T2)
Error
EC EL 0C EF
Refrigerant leakage detection (Cooling mode only)
Error
EE EE
High water level alarm

Lennox MCFA Series Specifications

General

Brand	Lennox
Model	MCFA Series
Category	Air Conditioner
Language	English