4. Troubleshooting
Troubleshooting by alarm code
SMGB0082 rev.1 - 07/2015
150
Alarm code
F1-51
~
54
Fan undervoltage / Fan overvoltage
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
EN
(Fan module)
What is the
operation
status of the fan
upon operation
restart?
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
Connect correctly
Replace the fuse
There is abnormality
in fan module. Please
replace it
Inspect the wiring system
and the capacity of wiring
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
Power source
voltage is within
230V±10%
A voltage higher than 170V is
supplied during operation
The devices activates
during operation and
voltage drops
LED501 of the fan
module is illuminated
The connection of the
fan module is correct
The fuse is conducting
electricity
Restart operation
