Carrier 40MAHB Series User Manual

40MAHB: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
14
INDOOR UNIT DIAGNOSTIC GUIDES
For ease of service, the systems are equipped with diagnostic code display LEDs on the indoor unit. There may be a few error codes displayed in the
indoor unit that might relate to the outdoor unit's problems. If possible, always check the diagnostic codes displayed on the indoor unit first.
Table 4 — Indoor Unit Diagnostic Guides
☆ = Flashing, X = Off
Table 5 — Indoor Unit Diagnostic Guides
O (on − light) X (off − light) ☆(flash)
GREEN LED RED LED FAILURE MODE
On X Standby, normal
X On Operation, normal
On On High/Low voltage protection on compressor terminal
On ☆ EEPROM error
X ☆ The compressor speed is out of control
☆ On Zero-crossing signal detection error; lack of phase; synchronization error
☆ X IGBT or Module protection
☆☆Communication error
OPERATION LAMP (TIMES) TIMER LAMP DISPLAY ERROR INFORMATION
☆1OFFEH 00/EH 0A Indoor unit EEPROM parameter error
☆2OFFEL 01 Indoor/outdoor unit communication error
☆3OFFEH 02 Zero-crossing signal detection error
☆4OFFEH 03 Indoor fan operating outside of the normal range
☆5OFFEC 51 Outdoor unit EEPROM parameter error
☆5OFFEC 52 T3 is in open circuit or has short circuited
☆5OFFEC 53 T4 is in open circuit or has short circuited
☆5OFFEC 54 TP is in open circuit or has short circuited
☆5OFFEC 56 T2B is in open circuit or has short circuited
☆6OFFEH 60 T1 is in open circuit or has short circuited
☆6OFFEH 61 T2 is in open circuit or has short circuited
☆12 OFF EC 07 Outdoor fan operating outside of the normal range
☆9OFFEH 0b Indoor PCB/Display board communication error
☆8OFFEL 0C Refrigerant leakage detection
☆7 FLASH PC 00 IPM malfunction or IGBT OSCP
☆2 FLASH PC 01 Over voltage or over low voltage protection
☆3 FLASH PC 02 Compressor or IPM high temp/pressure protection
☆5 FLASH PC 04 Inverter compressor drive error
☆1 FLASH PC 08 Current overload protection
☆6 FLASH PC 40 Comm. error between outdoor chip and compressor chip
☆7 FLASH PC 03 Low pressure protection
☆1ON-- Indoor units mode conflict
☆9OFFEH b1 Indoor board and Multi-function communication error
☆11 OFF FH 0d Ionizer malfunction

Carrier 40MAHB Series Specifications

General

Brand	Carrier
Model	40MAHB Series
Category	Air Conditioner
Language	English