Voyager 2 Modulating Heat Board (CFMB) LED Flash Codes
Old Fasco Board
LED Codes (FASCO)
Fault Indicator Output
The controller will indicate a fault condition by flashing the fault LED. The flashing pattern will be ¼ second on and ¼ second off for each count, if multiple faults are present it will dwell 2 seconds between each fault code, then dwell 5 seconds and repeat until the fault(s) are cleared.
1 flash – Not Used
2 flashes – Under Voltage - Should have 208-230V from heat transformer. Range should be +/- 10%. Measure the voltage at the board and at the combustion fan motor.
3 flashes – Over Voltage - Should have 208-230V from heat transformer. Range should be +/- 10%. Measure the voltage at the board and at the combustion fan motor. Overvoltage limit of the board is approx. 270V.
4 flashes – Over Temperature - This board is not connected to any temp/safety switches in the unit, this fault should not be experienced.
5 flashes – Over Current
New ICM Board
LED Codes (ICM)
Fault Indicator Output (ICM)
LED1 – Not used, only populated on engineering check samples. 208-230VAC power supply indicator.
LED2 – (Red) Fault status indicator. Solid on = normal operation. Flashing = fault.
LED3 – (Blue) Operational status indicator. Solid on = normal operation. Will pulse at motor start.
LED4 – (Green) Fault indicator
- 1 flash = NA
- 2 flashes = under voltage - Drive board shall trip offline when input voltage exceeds -15% (177 VAC)
- 3 flashes = overvoltage - Drive board shall trip offline when input voltage exceeds +10% (253 VAC) non labeled boards
- New boards will have a label new program and the overvoltage is (280 VAC)
- 4 flashes = overtemperature - The drive board shall self-protect in the event of high ambient temperatures or loss of ventilation flow in the panel.
- 5 flashes = overcurrent - The drive board shall self-protect in the event of overcurrent, including in the event of short circuit on the output terminals.
- 6 flashes = motor overload - Motor overload function is achieved with thermal cutout switches embedded in the blower motor end turns. There are two switches that directly interrupt current on two of the three phases. The two switches are independent, so motor overload will look like a loss of phase fault to the drive. It is possible, although unlikely that both cutout switches could open simultaneously. When loss of 1 or more phases is detected by the drive controls, motor overload fault will occur.
Fault Resetting – Fault shall auto-clear twice, then latch out on the third trip (three strikes, you’re out). Latching faults are cleared via power cycle.
WARNING:
Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.