Hitachi SAMURAI Series Service Manual page 158

4. Troubleshooting
Troubleshooting by alarm code
F1-51~54
Alarm code
N O T E
Fan number is indicated by the last digit (example: F1-51 for fan number 1........F1-54 for fan number 4)
Alarm stop reason
Low voltage level or over-voltage in the fan DC Inverter
N O T E
Causes alarm stop with 3 occurrences in 30 minutes. Retry control is performed until the second one. (Compressor
stops, and restarts automatically after 3 minutes).
Retry indication
LCD: View "FAN undervoltage retry" or "FAN overvoltage retry" and "№ 1 cycle" by touching the "Check".
Retry code
Fn-P8
PCB monitoring position
PCB (Fan module)
EN
Restart operation
Power source
voltage is within
230V±10%
Yes
A voltage higher than 170V is
supplied during operation
Yes
The devices activates
during operation and
voltage drops
No
LED501 of the fan
module is illuminated
No
The connection of the
fan module is correct
Yes
The fuse is conducting
electricity
No
Replace the fuse
150
SMGB0082 rev.1 - 07/2015
Fan undervoltage / Fan overvoltage
No
No
What is the
operation
Yes
status of the fan
upon operation
restart?
No
Connect correctly
Yes
Inspect the wiring system
and the capacity of wiring
Operation
without
abnormalities
and increase of
fan frequency
The fan runs,
but it stops
immediately
It runs at low
frequency, but
stops as soon as
frequency starts
to rise
There is abnormality
in fan module. Please
replace it