CVH8, HVH8, TVH8, VA9, HVA9, TVA9: APPLICATION GUIDELINE & SERVICE MANUAL
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
25
Variable Speed Drive LED Location and Description (Size 24)
NOTE
: If any of the AOC control board header pins are damaged or are not making good contact, AOC board should be replaced.
Table 15 – MOC LED Description (Size 24)
Reference
Color
Status
Condition
Description
LED200
Red
Steady On
Normal
Indicates MOC powered where DC bus at 40volts or higher
Off
Abnormal
No power, capacitor voltage drained
LED207
Amber
Steady On
Normal
Compressor is running
Blinking
Abnormal
If compressor stops, it indicates some fault happening;
If compressor is running, it indicates speed is limited or reduced.
Off
Normal
Compressor stops and no fault
Table 16 – AOC LED Descriptions (Size 24)
Reference
Color
Status
Condition
Description
STATUS
Amber
Steady On
Normal
AOC status-standby mode
Blinking
Abnormal
AOC function/fault status
COMM
Green
Steady On
Normal
Communication from AOC to indoor wall control
Table 17 – LED Not Functioning Properly- Requires AOC or Inverter Replacement
Reference
Color
Suspect AOC board
Failure Description
STATUS
Amber
If Amber STATUS light is not on (neither steady nor
blinking), with power to outdoor unit
AOC STATUS is not functioning properly and AOC board
should be replaced.
COMM
Green
In Communicating mode, if Green COMM LED is not on
when AB indoor wires are connected to AOC AB
connector and indoor has communications
AOC is not capable of communicating with indoor; AOC
board should be replaced.
Table 18 – Fault Codes requiring AOC or Inverter Replacement
Fault Code Description
Fault Flash Code
Failure Description
Communications Loss
179
Loss of communication with outdoor unit AOC board; AOC or Inverter may need to
be replaced
