Mitsubishi Electric QAHV Série Manuel D'installation & D'instructions page 65

Error
code *1
Error type
(PCB *2
RC
M-NET)
Inverter Voltage Bus voltage drop protection
error related
4220
problems
4225
during
108
( )
operation
Bus voltage rise protection
4220
4225
109
( )
Logic error
4220
4225
111
( )
Voltage meter error at start up
4220
(Bus voltage drop protection at start up
4225
(detected by the Main unit side))
131
( )
Heatsink fault
(Heatsink overheat protection)
4230
4235
Overload protection
4240
4245
ACCT sensor fault
5301
5305
115
( )
DCCT sensor
5301
5305
116
( )
ACCT sensor/circuit fault
5301
5305
117
( )
DCCT sensor/circuit fault
5301
5305
118
( )
Open-circuited IPM/loose ACCT sensor
5301
5305
( 119 )
Faulty wiring
5301
5305
120
( )
THHS sensor/circuit fault
5110
01 05
( ) ( )
Serial communication error/Thermal relay
0403
(THR2) operation
01 05
( ) ( )
IPM system error
Cause
(Installation/Setting error)
Momentary power failure/power failure
Power supply voltage drop (Inter-phase
voltage is 180 V or below.)
Voltage drop
Incorrect power supply voltage
Malfunction due to external noise
interference
• Faulty grounding
• Improper transmission and external
wiring installation
(Shielded cable is not used.)
• Low-voltage signal wire and high-
voltage wire are in contact.
(Placing the signal wire and power
wire in the same conduit)
Power supply voltage drop
Power supply voltage drop (Inter-phase
voltage is 180 V or below.)
Clogged heatsink cooling air passage
Short-cycling of air (reduced air flow)
Clogged heatsink cooling air passage
Power supply voltage drop (Inter-phase
voltage is 180 V or below.)
INV board switch setting error
GB-65
Cause
(Parts problems)
• Wirings that are connected to SC-P1 and
FT-N on the INV board are broken.
• INV board fault (4220)
• Fan board fault (4225)
• 72C fault
• Diode stack failure
• INV board fault (4220)
• Fan board fault (4225)
• INV board fault (4220)
• Fan board fault (4225)
• INV board fault
• Fan board fault
• 72C fault
• R1, R5 fault
• Fan motor fault
• INV board fan output fault
• THHS sensor fault
• IPM error (loose terminal screws,
cracked due to swelling)
• THHS sensor fault
• Current sensor fault
• INV board fan output fault
• INV circuit fault
• Compressor fault
• INV board fault
• Ground fault of the compressor and IPM
error
• Poor contact at the INV board connector
CNCT
• Poor contact at the INV board connector
DCCT
• Ground fault of the compressor and IPM
error
• Poor contact at the INV board connector
CNCT2 (ACCT)
• ACCT sensor fault
• Poor contact at the INV board connector
CNCT
• Poor contact at the INV board connector
DCCT
• DCCT sensor fault
• INV board fault
• Disconnected ACCT sensor (CNCT2)
• ACCT sensor fault
• Broken compressor wiring
• INV circuit fault (IPM error etc.)
• ACCT sensor is connected in the wrong
phase.
• ACCT sensor is connected in the wrong
orientation.
• THHS sensor contact failure
• THHS sensor fault
• INV board fault
• Communication error between control
board and INV board (noise interference,
broken wiring), or thermal relay (THR2)
operation
• Wiring or connector connection between
connectors on IPM-driven power supply
circuit
• INV board fault
Error reset *3
Unit
side Remote
(PCB)
Operation
SWS1
SW