Hitachi RAS-(4-6)HVRNS2E - Abnormality of Fan Motor Protection (DC Fan Motor) for es Series

8 Troubleshooting
278
SMGB0064 rev.0 - 08/2011
Alarm code
57
Abnormality of fan motor protection (DC fan motor) for ES Series
• The RUN LED ickers and “ALARM” is displayed on the remote control switch.
• The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit
number and the alarm code are displayed on the display of the outdoor unit PCB.
- The fan motor stops when the revolution output from the fan motor is 20 rpm for RAS-(2-3)HVRN(S)2 / 10 rpm for
RAS-(4-10)H(V)RNS(2)E or lower during 30 seconds after the fan motor activation.
- The alarm is indicated when the abnormality is repeated 4 times for RAS-(2-3)HVRN(S)2 / 10 times for RAS-(4-10)
H(V)RNS(2)E within 5 minutes after the rst detection.
N O T E
• In the case that the fan motor does not run even the PCB1 is replaced, replace PCB5.
• Check to ensure that DC Fan Motor is checked according to the item Procedure of checking other main parts
for ES Series, see on page 312