Variable Speed Drive Led Location And Description - Carrier EVOLUTION 189BNV Service Manual

Variable Speed Drive LED Location and Description (Sizes 25, 36, 37, 48, 49 and 60)
Reference Color
LD1 Red
LED1 Red
LED3 Amber
LD5 Green
Reference Color
STATUS
Amber
COMM
Green
Reference Color
STATUS Amber
COMM Green
Fault Code Description
Communications Loss
NOTE: If any of the AOC control board header pins are damaged or are not making good contact, AOC board should be replaced.
MOC LED Description (Sizes 25, 36, 37, 48, 49 AND 60)
Status
Steady On MOC powered where DC bus is 40volts or greater
Off No power, capacitor voltage drained
Steady On DCF and board DC high voltage and discharge circuit powered on
Off No power
Steady On MOC board switching power supply to power AOC board on
Off No Power
Blinking Indicates communication from MOC to AOC
Steady On Indicates 5 volt connection status OK between AOC and MOC
Off No Power
AOC LED Descriptions (Sizes 25, 36, 37, 48, 49 AND 60)
Status
Steady On AOC status --- standby mode
Blinking AOC function/fault status
Steady On Communication from AOC to indoor wall control
LED Not Functioning Properly --- Requires AOC or Inverter Replacement
Suspect AOC board
If Amber STATUS light is not on (neither steady nor blink-
ing), with power to outdoor unit
In Communicating mode, if Green COMM LED is not on
when AB indoor wires are connected to AOC AB connector
and indoor has communications
UI Fault Codes requiring AOC or Inverter Replacement
AOC STATUS is not functioning properly and AOC board
should be replaced.
AOC is not capable of communicating with indoor; AOC
board should be replaced.
Fault Code
Loss of communication with outdoor unit AOC board;
179
AOC or Inverter may need to be replaced
28
Description
Description
Failure Description
Failure Description