Mitsubishi Heavy Industries SRK100VNXWZRF Service Manual page 32

TIMER
Error code Red LED RUN light
light
Keeps
ON
flashing
3) FDC100VNP-W
5-time
ON
Remote control Indoor unit display
flash
TIMER
Error code Red LED RUN light
light
Keeps 2-time
flashing flash
Keeps
ON
flashing
Keeps
1-time flash
flashing
Keeps 4-time
5-time
flashing flash
ON
flash
— —
Keeps — 2-time —
Keeps flashing flash
flashing
ON 1-time flash
Keeps 1-time
flashing flash
— —
7-time
ON
flash
Keeps
Keeps 4-time
flashing
flashing flash
— —
– –
4-time 1-time
ON
ON
flash
flash
5-time
Keeps 5-time
ON
flash
flashing flash
7-time
ON
flash
— —
4-time
ON
flash
7-time
ON
flash
7-time
ON
flash
— —
3-time
ON
Note (1) * mark in the Description of trouble means that, in ordinary diagnosis, it cannot identify the cause definitely, and, if the trouble is repaired by replacing the part, it
flash
is judged consequently that the replaced part was defective.
– –
2-time 2-time
flash flash
Note * mark in the description of trouble means that, in ordinary diagnosis, it cannot identify the cause definitely, and, if the trouble is repaired by replacing the
part, it is judged consequently that the replaced part was defective.
(iii) Option control in-use
Indoor unit display panel
Error code Red LED RUN light TIMER light
Keeps flashing －
Red LED Green LED Yellow LED
Keeps
1-time flash
flashing
Keeps
1-time flash
flashing
Location of trouble
Installation, operation status • Higher outdoor heat exchanger temperature
Keeps
Keeps
flashing
1-time flash
Outdoor heat exchanger flashing
• Defective outdoor heat exchanger temperature sensor
temperature sensor
Keeps
Outdoor unit PCB *• Defective outdoor unit PCB (Defective temperature sensor input circuit)?
1-time flash
flashing
Installation, operation status • Higher discharge temperature
Keeps
Discharge pipe temperature
1-time flash
• Defective discharge pipe temperature sensor
flashing
sensor
Outdoor unit PCB *• Defective outdoor unit PCB (Defective temperature sensor input circuit)?
Keeps
1-time flash
flashing
Outdoor heat exchanger • Defective outdoor heat exchanger temperature sensor, broken wire or poor
Keeps
temperature sensor connector connection
1-time flash 6-time flash
flashing
Outdoor unit PCB *• Defective outdoor unit PCB (Defective temperature sensor input circuit)?
Keeps
1-time flash
1-time flash
flashing
• Defective outdoor air temperature sensor, broken wire or poor connector
Outdoor air temperature sensor
connection
Keeps
1-time flash
flashing
Outdoor unit PCB *• Defective outdoor unit PCB (Defective temperature sensor input circuit)?
Keeps
1-time flash Discharge pipe temperature • Defective discharge pipe temperature sensor, broken wire or poor connector
flashing
Keeps
sensor connection
flashing
Outdoor unit PCB *• Defective outdoor unit PCB (Defective temperature sensor input circuit)?
Keeps
1-time flash
flashing
Installation, operation status • Service valve (gas side) closing operation
Outdoor unit PCB, compressor • Current cut (Anomalous compressor over-current)
Keeps
1-time flash 6-time flash
flashing
Installation, operation status • Service valve closing operation
• Over voltage
Keeps
Outdoor unit PCB
1-time flash
flashing • Defective active filter
Fan motor • Defective fan motor
Keeps
Outdoor unit PCB Keeps • Defective outdoor unit PCB
1-time flash
flashing
flashing
Power transistor error
• Power transistor error
(Outdoor unit PCB)
Keeps
1-time flash
Operation status • Shortage in refrigerant quantity
flashing
Installation status • Service valve closing operation
Keeps
5-time flash
Stays OFF
flashing
• Overload operation
• Overcharge • Current safe stop
• Compressor locking
• Anomalous compressor startup
Compressor, outdoor unit PCB
• Voltage drop
Compressor • Anomalous compressor rotor lock
Outdoor unit control PCB
Red LED Green LED
－ Stays OFF Keeps flashing • Communication error (Defective communication circuit on the main unit of SL2NA-E or SC-SL4-AE/BE) ete.
-
Location of trouble
Installation or operating
• Higher outdoor heat exchanger temperature
condition
Outdoor heat exchanger
• Defective outdoor heat exchanger temperature sensor
temperature thermistor
*• Defective outdoor unit control PCB (Defective temperature sensor input
Outdoor unit control PCB
circuit)?
Installation or operating
• Higher discharge temperature
condition
temperature sensor • Defective discharge pipe temperature sensor
Description of trouble
Outdoor unit control PCB *• Defective outdoor unit control PCB (Defective temperature sensor input circuit)?
Outdoor heat exchanger • Defective outdoor heat exchanger temperature sensor, broken wire or poor
temperature thermistor connector connection
*• Defective outdoor unit control PCB (Defective temperature sensor input
Outdoor unit control PCB
circuit)?
Outdoor air temperature • Defective outdoor air temperature sensor broken wire or poor connector
thermistor connection
*• Defective outdoor unit control PCB (Defective temperature sensor input
Outdoor unit control PCB
circuit)?
Discharge pipe • Defective discharge pipe temperature sensor broken wire or poor connector
temperature sensor connection
*• Defective outdoor unit control PCB (Defective temperature sensor input
Outdoor unit control PCB
circuit)?
Installation or operating
• Rising high pressure (Operation of 63H1) • Service valve closing operation
condition
Outdoor unit control PCB *• Defective outdoor unit control PCB (Defective 63H input circuit)?
Inverter PCB or radiator
• Power transistor overheat
fin
Outdoor unit control
• Current cut (Anomalous compressor over-current)
PCB compressor
Installation or operating
• Service valve closing operation
condition
Outdoor unit control PCB • Anomalous outdoor unit control PCB communication
Inverter PCB • Anomalous inverter PCB communication
Outdoor fan motor • Anomalous outdoor fan motor
Outdoor unit control PCB *• Defective outdoor unit control PCB (Defective motor input circuit)?
Installation or operating
• Low pressure error • Service valve closing operation
condition
• Anomalous low pressure, broken wire of low pressure sensor or poor
Low pressure sensor
connector connection
Outdoor unit control PCB *• Defective outdoor unit control PCB (Defective sensor input circuit)?
Inverter PCB • Anomalous inverter PCB
Suction pipe • Defective suction pipe temperature sensor, broken wire or poor connector
temperature sensor connection
Outdoor unit control PCB *• Defective outdoor unit PCB (Defective sensor input circuit)?
Low pressure sensor • Defective low pressure sensor
Outdoor unit control PCB • Defective outdoor unit control PCB (Defective sensor input circuit)?
Operation status • Shortage in refrigerant quantity
Installation status • Service valve closing operation
Compressor,
•Anomalous compressor startup
inverter PCB
Description of trouble
31
-
Description of trouble
'22 • PAC-SM-422
Repair method
Repair
Replacement, repair
of temperature
sensor
Replacement of
PCB
Repair
Replacement, repair
of temperature
sensor
Replacement of
PCB
Replacement, repair
of temperature
sensor
Replacement of
PCB
Replacement, repair
of temperature
sensor
Replacement of
PCB
Replacement, repair
of temperature
sensor
Replacement of
PCB
Replacement
Replacement of
PCB
Repair
Repair
PCB replacement
Replacement
Replacement of
PCB
Repair
Service valve
opening check
Replacement
Replacement
Replacement
Reference
Repair method
page
Repair
Replacement of
153
temperature thermistor
Replacement of PCB
Repair
Replacement, repair of
154
temperature thermistor
Reference
page
Replacement of PCB
Replacement, repair of
temperature thermistor
155
Replacement of PCB
103
Replacement, repair of
temperature thermistor
156
Replacement of PCB
Replacement, repair of
temperature thermistor
157
104
Replacement of PCB
Repair
158
Replacement of PCB
Replacement of PCB
159
or Repair 106
Replacement of PCB
160・161
Repair
107
Replacement of PCB 162
Replacement, repair
163
Replacement of PCB
108
Repair
Replacement, repair of
164・165
sensor
111
Replacement of control
PCB
166
Replacement of PCB
114・115
Replacement, repair of
temperature thermistor
123
167
Replacement of control
PCB
126
Replacement of sensor
168
Replacement of control
PCB
131
Repair
169
Service valve opening
check 136
Replacement 170・171
138
145
146
Repair method
Replacement