Inverter Error; Inverter Pcb - Fujitsu Airstage VR-II Series Service Manual

Trouble shooting 31
OUTDOOR UNIT Error Method:

Inverter Error

Detective Actuators:

Inverter PCB

Forecast of Cause :
1. Noise, momentary open, voltage drop.
2. Power supply to Filter PCB (INV) to Inverter PCB wiring disconnection, open
3. Main PCB to Inverter PCB wiring disconnection, open
4. Magnetic Relay (for inverter) coil side wiring disconnection, open
5. Magnetic Relay activation circuit defective
6. Main PCB or Filter PCB (INV) or Inverter PCB defective
7. Cement Resistor Open circuit
Check Point 1-1 : Turn the power on again
Error displayed again?
YES
Check Point 2 : Check error display
"Inverter PCB short interruption detection" or
"Rush current limiting resistor temp. rise protection" also occur?
NO
Check Point 3 : Check the wiring (Power supply to Filter PCB (INV) to Inverter PCB)
Connector and wiring connection state check
Cable open check
OK
Check Point 4 : Check the wiring (Main PCB to Inverter PCB)
Connector and wiring connection state check
Cable open check
OK
Check Point 5 : Check Cement resistor
Check resistance of cement resistor
If the circuit of both terminal was open circuit, exchange the Resistor
Correct resistance value: 5.3 - 6.0 Ohm
OK
Check Point 6 : Check Filter PCB (INV) and Inverter PCB
Check Filter PCB (INV) and Inverter PCB.
(Refer to "Service Parts Information 3, 4".)
Caution
By changing of DIP SW 4-2 to ON, the Back-up operation can start when the active outdoor unit exists on the multi outdoor unit connection.
(Stand alone outdoor unit is impossible)
The following conditions will be concerned in use of back-up operation. (Please do not use the system with back-up operation for long time.)
- The operating compressor life time becomes shorter.
- The operating performance may drop due to the limited active compressor(s).
- The compressor may stop frequently by protection controlling.
*In order to keep the operating capacity, the release of the Low noise mode setting might be necessary.
Indicate or Display:
E63. 1
Outdoor Unit : E. 6 3. 1
Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash,
Error Code : 9 U / 6 3
Detective details:
Error information received from Inverter PCB.
When "Inverter PCB short interruption detection" or "Rush current limiting
resistor temp. rise protection" occurs, Inverter error also occurs.
Check Point 1-2 : Noise, momentary open, voltage drop
NO
YES
04-40
Filter LED Continuous Flash.
Check if temporary voltage drop was not generated.
Check if momentary open was not generated.
Check if ground is connection correctly or there are no related cables
near the power line.
In case of "Inverter PCB short interruption detection",
Refer to the Trouble shooting 33.
In case of "Rush current limiting resistor temp. rise protection",
Refer to the Trouble shooting 34.