11. TROUBLESHOOTING
If the integrated control LED of the unit is flashing, this means the unit sensors detected a problem. See the table below to know where on the unit the problem occurs.
LED flashes GREEN. LED flashes AMBER. LED flashes RED.
• Thermistor error. | Replace the entire port assembly (fresh air from outside port). |
• Damper error. | Go to Point 6. |
•The door is open and the unit is not unplugged. Close the door and press once on the integrated control push button to reset the unit.
• Exhaust motor error. | Go to Point 5. |
Problems | Possible causes | You should try this |
1. Unit does not work. | •The circuit board may be defective. |
•Unplug the unit. Disconnect the main control and the auxiliary control(s) (if need be). Jump G and B terminals. Plug the unit back and wait about 10 seconds. If the motors run on high speed and the damper opens, the circuit board is not defective.
NO C NC I OC OL Y R G B
VE0097
2. The damper actuator | •The damper actuator or the integrated |
does not work. | damper port mechanism may be defective. |
•The circuit board may be defective.
•Unplug the unit. Disconnect the main control and the optional control(s) (if need be). Wait 10 seconds and plug the unit back. Check if the damper opens. If not, use a multimeter and check for 24V AC on
detecting the 24V AC signal at
•If there is no 24V AC, replace the circuit board.
3.The wall control does not work OR the indicators flash.
•The wires may be in reverse position.
•The wires may be broken. •The wire in the wall OR the wall control may be defective.
•Ensure that the color coded wires have been connected to their appropriate places.
•Inspect every wire and replace any that are damaged.
•Remove the wall control and test it right beside the unit using another shorter wire. If the wall control works there, change the wire. If it does not, change the wall control.
4.The Humidity Control does not work OR the
•The wires may be in reverse position.
•The Humidity Control or push button may be defective.
•Ensure that the color coded wires have been connected to their appropriate places.
•Jump the OL and OC terminals. If the |
|
|
|
|
|
|
|
|
|
| |
unit switch to high speed, remove the | NO | C | NC | I | OC | OL | Y | R | G | B | |
Humidity Control or push button and | |||||||||||
|
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
| ||
test it right beside the unit using |
|
|
|
|
|
|
|
|
|
| |
beside the unit using another VE0098 | |||||||||||
shorter wire. If it works here, change |
|
|
|
|
|
|
|
|
|
|
the wire. If it doesn’t, change the Humidity Control or the push button.
5.The supply and/or exhaust motor do not work.
•The circuit board may be defective.
•The motor(s) may be defective.
•Press on the integrated control push button until the unit turn on low speed (the LED will light AMBER). Using a multimeter, check the voltage on
•Using a multimeter, check the ohms value on each motor connectors. Black motors values: For BLUE and BLACK motor wires, the right value is
±55 ohms.For BLUE and BROWN motor wires, the right value is ± 35 ohms. For BROWN and BLACK motor wires, the right value is ± 89 ohms.Aluminum motors values: For BLUE and BLACK motor wires, the right value is ± 51 ohms. For BLUE and BROWN motor wires, the right value is ± 47 ohms.For BROWN and BLACK motor wires, the right value is ± 98 ohms. If the ohm values are the same, the motor is not defective. Replace the motor capacitor.
6. | The defrost cycle does not work •Ice deposits may be hindering | •Remove the ice. | |
| (the fresh air duct is frozen OR | the damper operation. |
|
| the fresh air distributed |
|
|
| is very cold. | •The damper rod or the port | •Inspect these parts and replace if necessary. |
|
| damper itself may be broken. |
|
|
| •The damper actuator or circuit board | •See point 2. |
|
| may be defective. |
|
|
|
|
|
7. | The integrated control | •The | • See Section 4.1.1 Boot Sequence |
| push button does not work. | is not completed. |
|
- 26 -