Table of Contents
[8-10 Troubleshooting Inverter Problems ]
8-10-9
Checking the Fan Board for Damage at No Load
Items to be checked
(1)
Stop the unit.
Turn off the breaker.
*Be sure to turn off the power.
(2)
To allow for the disconnection
of output wiring from the fan
motor, disconnect connector
RYFAN1. (On a model with
two fan motors, RYFAN1 cor-
responds to the right fan and
RYFAN2 corresponds to the
left fan (when seen from the
front).)
(3)
Set SW7-2 on the control
board to ON. On a model with
two fan motors, set SW7-2
(left fan when seen from the
front) or SW7-4 (right fan
when seen from the front) to
ON.
(4)
Turn on the breaker.
(5)
Operate the unit
BS_08_E
Phenomena
1)
An error other than the current sen-
sor error (5305, 5306 Detail code
135) is detected within 30 seconds
from the startup of operation.
2)
Inter-wire voltage imbalance of 5 V or
above
3)
No inter-wire voltage imbalance ex-
ists. A current sensor error (Detail
code 135) is detected 30 seconds af-
ter the startup of operation, and the
operation stops.
Remedy
Replace the fan board.
Replace the fan board.
Normal
*When done checking, reconnect all
connectors as they were. Unless
they are properly reconnected, cur-
rent sensor fault will not be resolved.
chapter 8 -
47
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