Sakata SOB-50VA, Service Manual

Page: 99 / 118

Light Commercial R410A on-off
S13-01.01.13en
(5)For the other types indoor unit
0.5Hz
5Hz, Timer lamp on
It cannot recover unless
5Hz
5Hz
lamp flashing at 5Hz
LEDs’ for the indication of outdoor trouble
Note:
1. If the LED1-LED3 are flashing slowly, means the system is stand-by.
2. T3: Outdoor condenser temperature sensor
3. T4: Outdoor ambient temperature sensor
Outdoor Units. Troubleshooting
98
Type Contents LED1 LED2 LED3
Trouble Phase sequence Flash Off Off
Trouble Lack of phase(A,B) Flash Off Off
Trouble Lack of phase(C) Off Off Off
Trouble Protection of Low pressure Flash Flash Off
Trouble Overload of current Off Off Flash
Trouble Communication malfunction Flash Off Flash
Trouble Open-circuit and short-circuit trouble of T3 Off Flash Flash
Trouble Open-circuit and short-circuit trouble of T4 Off Flash Off
Trouble High temperature protection of condenser Flash Flash Flash
No. Type Contents LED Flashing Remark
1 Normal Standing-by
Operation lamp flashes at
Nothing wrong with the
unit when LED indicate
these contents.
2 Normal System Off All lamps are off
3 Normal System startup Operation lamp on
4 Normal Forced cooling
Operation lamp flashes at
5 Protection
Over current protection of the
compressor occurs 4 times in 1h
Lamps of operation, timer,
defrosting (only fan)
flashing simultaneously at
5Hz.
Whole unit is shut down.
power is cut off
6 Protection
Outdoor protection (lack of
phase, phase sequence and
temperature protection)
All lamps flashing at 5Hz
Recover automatically
after errors are
eliminated (For T3
malfunction of 5HP,
can’t
recover automatically)
7 Error
Room temperature sensor
checking channel is abnormal
Timer lamp flashing at 5Hz
8 Error
Evaporator sensor checking
channel is abnormal Operation lamp flashing at
9 Error
Condenser sensor checking
channel is abnormal Defrosting lamp flashing at
10 Error
Communication of EEPROM
malfunction Operation lamp and timer
11 Error
Water level alarm/pump sensor
malfunction
Alarm lamp flashes at 5Hz