Lennox MMDA048S4-1P User Manual

Lennox Mini-Split Service Manual / Page 130
Single Zone 018/030 208-230VAC Outdoor Units Quick Reference
main control board
LED display
Slow flash
OFF
Standby
LIT
OFF
Normal operation
OFF
IDU & ODU communication error or
Fast flash
ODU temp.sersor error or
ODU EEPROM error or
Outdoor fan motor speed out of control or
Compressor top temp.Switch open
Fast flash
DC bus voltage too high/
too low protection
Fast flash
Fast flash
Fast flash Fast flash
OFF
Driver EEPROM error
Fast flash
Fast flash
Driver phase loss protection,or
zero speed protection, or
PWM synchronization failure
Driver
Fast flash
OFF
Fast flash
IGBT over-current/IPM over-current
Fast flash
Fast flash Fast flash
Control board chip communication error
NOTE Slow flash----Flashing at 1Hz Fast flash----Flashing at 2Hz
IDU--Indoor unit ODU---Outdoor unit
Driver chip start-up failure
IPM board
(comp.driver)
LIT
LIT
LIT
LIT
LIT
LIT
LIT
Blue LED
Red LED
Green LED
Error Description
Outdoor Unit Sticker Shown - See Indoor Unit for Error Code

Lennox MMDA048S4-1P Specifications

General

Brand	Lennox
Model	MMDA048S4-1P
Category	Air Conditioner
Language	English