
Alarm code
48
Overcurrent protection activation for IVX series
Restart operation.
Does it trip soon?
Yes
Turn OFF power and
disconnect U, V, W from
compressor terminals.
Turn ON #1 of DSW1 on PCB2
(IPM or dipIPM) and restart.
Does it trip? *1)
No
No
Is there any cause of
instantaneous voltage
decrease?
No
Check the
compressor.
Check the power
source capacity.
Replace the PCB2
(IPM or dipIPM). *1)
Yes
Yes, it
trips
It trips
immediately
In case of 380-415V/50Hz
Is the power supply voltage 380V ±10% or 415V ±10% ?
In case of 220~240V/50Hz:
Is the power supply voltage 230V ±10%?
Yes
In case of 380-415V/50Hz:
Is the power supply voltage 323V during operation?
In case of 220~240V/50Hz:
Is the power supply voltage 187V during operation?
Yes
Is it 170V (single phase) or 340V (3 phases) or more
during operation when other devices are operating?
Yes
Is the compressor running current the same as rated
current?
Yes
Check the capacity and
wiring of the power source.
Check the fan.
Check for clogging at
heat exchanger.
Check the stop valves
and expansion valve.
Check the compressor.
Restart expansion
valve.
Charge refrigerant
correctly.
Restart operation after
applying current.
Is current applying to
crankcase heater?
No
No
No
No
Is refrigerant charged
excessively?
Yes
Yes
No
Is lock of indoor expansion valve
opened at cooling operation?
Is lock of outdoor expansion valve
opened at heating operation?
Yes
Is pressure excessively
high?
No
Yes
It trips after a
certain period
N O T E
•
*1) Perform the high voltage discharge work by referring to section
Procedure of checking other main parts for
ES Series
, see on page 312 before checking and replacing the inverter PCB.
8 Troubleshooting
264
SMGB0060 rev. 1- 12/2010
Summary of Contents for RAS-10HRNM
Page 2: ......
Page 4: ...Index ii SMGB0060 rev 1 12 2010 ...
Page 56: ...2 Unit Installation 48 SMGB0060 rev 1 12 2010 ...
Page 117: ...RAS 4 6 HVRNM1E 4 Electrical Wiring 109 SMGB0060 rev 1 12 2010 4 ...
Page 118: ...RAS 4 6 HRNM1E 4 Electrical Wiring 110 SMGB0060 rev 1 12 2010 ...
Page 121: ...RAS 3HVRNS 4 Electrical Wiring 113 SMGB0060 rev 1 12 2010 4 ...
Page 122: ...RAS 4 6 HVRNS1E 4 Electrical Wiring 114 SMGB0060 rev 1 12 2010 ...
Page 123: ...RAS 8 10 HRNSE 4 Electrical Wiring 115 SMGB0060 rev 1 12 2010 4 ...
Page 124: ...4 Electrical Wiring 116 SMGB0060 rev 1 12 2010 ...
Page 145: ...Dry operation Continues in the next page 5 Control System 137 SMGB0060 rev 1 12 2010 5 ...
Page 147: ...Heating operation Continues in the next page 5 Control System 139 SMGB0060 rev 1 12 2010 5 ...
Page 148: ...5 Control System 140 SMGB0060 rev 1 12 2010 ...
Page 153: ...Activation for protection device control 5 Control System 145 SMGB0060 rev 1 12 2010 5 ...
Page 162: ...Activation for protection device control 5 Control System 154 SMGB0060 rev 1 12 2010 ...
Page 166: ...Preheating control of compressor 5 Control System 158 SMGB0060 rev 1 12 2010 ...
Page 168: ...5 Control System 160 SMGB0060 rev 1 12 2010 ...
Page 180: ...6 Optional functions 172 SMGB0060 rev 1 12 2010 ...
Page 224: ...8 Troubleshooting 216 SMGB0060 rev 1 12 2010 ...
Page 263: ...RAS 4 6 HVRNS1E 8 Troubleshooting 255 SMGB0060 rev 1 12 2010 8 ...
Page 264: ...RAS 8 10 HRNSE 8 Troubleshooting 256 SMGB0060 rev 1 12 2010 ...
Page 269: ...RAS 8 10 HRNSE 8 Troubleshooting 261 SMGB0060 rev 1 12 2010 8 ...
Page 337: ...RAS 4 6 HVRNM1E Cycle and structural parts 9 Spare Parts 329 SMGB0060 rev 1 12 2010 9 ...
Page 340: ...RAS 4 6 HRNM1E Cycle and structural parts 9 Spare Parts 332 SMGB0060 rev 1 12 2010 ...
Page 342: ... Electrical parts 9 Spare Parts 334 SMGB0060 rev 1 12 2010 ...
Page 354: ... Electrical parts 9 Spare Parts 346 SMGB0060 rev 1 12 2010 ...
Page 356: ...RAS 8 10 HRNSE Cycle and structural 9 Spare Parts 348 SMGB0060 rev 1 12 2010 ...
Page 359: ... Electrical parts 9 Spare Parts 351 SMGB0060 rev 1 12 2010 9 ...
Page 440: ...10 Servicing 432 SMGB0060 rev 1 12 2010 ...
Page 464: ...11 Electrical checks of main parts 456 SMGB0060 rev 1 12 2010 ...
Page 481: ......