Lennox MCB Series Service Manual

7
3. Quick Maintenance by Error Code
The following is a part replacement matrix based on the active error code.
Table 4. Component Replacement Based on Error Code (Part 1)
Part Requiring Replacement
Error Code
EH 00 / EH 0A EL 01 EH 03 EH 60 EH 61 EH 0b EL 0C PC 08
Indoor PCB
√ √ √ √ √ √ √ X
Outdoor PCB
X √ X X X X X √
Display board
X X X X X √ X X
Indoor fan motor
X X √ X X X X X
T1 sensor
X X X √ X X X X
T2 sensor
X X X X √ X √ X
T2B sensor
X X X X X X X X
Reactor
X √ X X X X X X
Compressor
X X X X X X X √
Additional refrigerant
X X X X X X √ X
Table 5. Component Replacement Based on Error Code (Part 2)
Part Requiring Replacement
Error Code
EC 53 EC 52 EC 54 EC 51 EC 07 PC 00 PC 01 PC 04
Indoor PCB
√ √ √ √ √ √ √ √
Outdoor PCB
X X X X X X X X
Outdoor fan motor
X X X X √ √ X √
T3 sensor
X √ X X X X X X
T4 sensor
√ X X X X X X X
TP sensor
X X √ X X X X X
Reactor
X X X X X X √ X
Compressor
X X X X X √ X √
IPM module board
X X X X X √ √ √
High pressure protector
X X X X X X X X
Low pressure protector
X X X X X X X X
Additional refrigerant
X X X X X X X X
NOTE: For certain models, the outdoor PCB can not be removed separately. In this case, the outdoor electric control
box should be replaced as a whole.

Lennox MCB Series Specifications

General

Brand	Lennox
Model	MCB Series
Category	Air Conditioner
Language	English