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Refrigeramt Diagram
71
6.5 Rotation pulse check on outdoor unit PCB
Make sure that the voltage of 320 ± 30 V is applied.
1. Set operation off and power off. Disconnect the connector S71.
2. Check that the voltage between the pins 4 & 7 is 320 VDC.
3. Check that the control voltage between the pins 3 & 4 is 15 VDC.
4. Check that the rotation command voltage between the pins 2 & 4 is 0 - 6.5 VDC.
5. Keep operation off and power off. Connect the connector S71.
6. Check whether 4 pulses (0 ~ 15 VDC) are output at the pins 1 - 4 when the fan motor is rotated 1 turn by
hand.
When the fuse is melted, check the outdoor fan motor for proper function.
If NG in step 2 : Defective PCB and replace the outdoor unit PCB.
If NG in step 4 : Defective Hall IC and replace the outdoor fan motor.
If OK in both steps 2 and 4,replace the outdoor unit PCB.
1
2
3
4
5
6
7
PCB
S71
Actual rotation pulse input (0 ~ 15 VDC)
320 VDC
Control voltage 15 VDC
Rotation command voltage (0 ~ 6.5 VDC)
6.6 Installation condition check
Is the
discharged air
short-circuited?
Is the
outdoor heat
exchanger very
dirty?
Yes
Installation condition check.
Change the installation location
,direction or remove obstacles.
Clean the outdoor heat
exchanger.
Yes
Check the
allowable dimensions
of the air suction and
discharge area.
OK
No
No
Yes
NG
Check the outdoor
temperature. (The outdoor
temperature should be
within the operation range.)
Is the
airflow blocked by
obstacles or winds
blowing in the opposite
direction?
No
Change the installation location
,direction or remove obstacles.
Change the installation location
,direction or remove obstacles.