Hitachi FSXN Series Service Manual page 191

8 Troubleshooting
06
Alarm code
.
• The RUN indicator flashes and the ALARM indication is displayed on the remote control switch.
• The unit no., the alarm code and the unit code are alternatively displayed in the temperature setting section and the unit
no. and alarm code are displayed on the outdoor unit's PCB1 display.
* This alarm is indicated when voltage between terminal "R" and "S" of fan controller is insufficient and its occurence is
three times in 30 minutes. In the case that the occurrence is maller than 2 times, retry is performed.
Restart operation.
No
Is the power supply
voltage 220V+10% or
240V+10%?
Yes
No
Is the power supply
voltage more than
187V?
Yes
Does the voltage
Yes
fall during operation
by operation of
other apparatus?
No
Yes
Does LED201 on
fan controller ON?
No
No
Is connection correctly
at fan controller?
Yes
• If fan controller has high voltage, perform the high voltage discharge work according to
main parts, see on page 267.
• Check the wiring connection according to the checking procedure of fan controller indicated in the
for other main parts, see on page 267.
185
SMGB0065 rev. 1 - 12/2010
Abnormal fan controller voltage.
Fan revolution
can increase.
How is
Fan stops
fan motor
immediately.
operation?
Fan stops when
fan revolution is
increasing.
<Outdoor Unit PCB1 Display Indication>
PCB1: Control PCB in Outdoor Unit
Check wiring and
wire sizes.
Faulty fan controller.
Replace it.
Connect correctly.
Abnormal of Fan Controller
Checking procedures for other
Checking procedures
8