Table of Contents
[8-7 Troubleshooting Outdoor Unit Fan Problems ]
8-7
Troubleshooting Outdoor Unit Fan Problems
(1) Fan motor (common items)
To check the revolution of the fan, check the inverter output state on the self-diagnosis LED, as the inverter on the outdoor
fan controls the revolutions of the fan.The revolution of the fan is approximately 680rpm(EP200 model),790rpm(EP250 mod-
el), 630rpm (EP300 model), 750rpm (EP350, EP400, EP450 models) at full speed.
When starting the fan, the fan runs at full speed for 5 seconds.
When setting the DIP SW4 (when SW6-10 is set to OFF) as shown in the figure below, the inverter output [%] will appear.
100% indicates the full speed and 0% indicates the stopping. (Fan 2 is only on the P450, EP400 - EP500 models.)
For how to read the SW settings, refer to the following page(s). [9-1-1 How to Read the LED](page 385)
As the revolution of the fan changes under control, at the interphase or when the indoor unit operation capacity is low, the
revolution of the fan may change.
If the fan does not move or it vibrates, Fan board problem or fan motor problem is suspected. When checking the fan motor
for problems by shutting down the power, be sure to disconnect the motor wire from the fan board. If a short-circuited fan board
malfunctions, it will keep the fan motor from rotating smoothly. For details, refer to the following page(s).
[8-10-7 Checking the Fan Motor for Ground Fault and Coil Resistance Problems](page 341)
[8-10-8 Checking the Fan Board Error Detection Circuit at No Load](page 341)
[8-10-9 Checking the Fan Inverter for Damage at No Load](page 342)
[8-10-10 Checking the Fan Inverter for Damage with Load](page 343)
HWE1314A
Fan 1
Fan 2
SW4
SW4
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