Mitsubishi Electric SUZ-KA60VA3, Техническое и сервисное руководство

Страница: 25 / 58

25
SUZ-KA60VA3.TH SUZ-KA71VA3.TH
Check code
(Wired remote
controller)
Abnormal point
(Failure mode / protection)
LED indication
(Outdoor P.C. board)
Condition Remedy
Indoor/outdoor
unit failure
mode recall
function
Outdoor unit
failure mode
recall function
—
None (Normal)
— — — — —
UP
Outdoor power system
—
Overcurrent protection cut-out
operates 3 consecutive times within
1 minute after the compressor gets
started. Reconnect
connectors.
Refer to 11-5.
a
"How
to check inverter/
compressor".
Check stop valve.
•
•
•
○ ○
U3
Discharge temperature
thermistor 1-time fl ash every
2.5 seconds Thermistor shorts or opens during
compressor running. Refer to 11-5.
g
"Check of outdoor
thermistors".
Defective outdoor
thermistors can be
identifi ed by checking
the blinking pattern
of LED.
•
○ ○
U4
Defrost thermistor
Fin temperature thermistor 3-time fl ash
2.5 seconds OFF
P.C. board temperature
thermistor 4-time fl ash
2.5 seconds OFF
Ambient temperature
thermistor 2-time fl ash
2.5 seconds OFF
Outdoor heat exchanger
temperature thermistor
—
UF
Overcurrent 11-time fl ash
2.5 seconds OFF
Large current fl ows into intelligent
power module. Reconnect
compressor connector.
Refer to 11-5.
a
"How
to check inverter/
compressor".
Check stop valve.
•
•
•
—
○
Compressor synchronous
abnormality (Compressor
start-up failure protection) 12-time fl ash
2.5 seconds OFF Waveform of compressor current is
distorted. Reconnect
compressor connector.
Refer to 11-5.
a
"How
to check inverter/
compressor".
•
•
—
○
U2
Discharge temperature
—
Temperature of discharge temperature
thermistor exceeds 116°C, compressor
stops.
Compressor can restart if discharge
temperature thermistor reads 100°C or
less 3 minutes later. Check refrigerant
circuit and refrigerant
amount.
Refer to 11-5.
k
"Check of LEV".
•
•
—
○
UD
High pressure
—
Temperature of indoor coil thermistor
exceeds 70°C in HEAT mode.
Temperature of outdoor heat
exchanger temperature thermistor
exceeds 70°C in COOL mode. Check refrigerant
circuit and refrigerant
amount.
Check stop valve. •
•
—
○
U5
Fin temperature 7-time fl ash
2.5 seconds OFF Temperature of fi n temperature
thermistor on the inverter P.C. board
exceeds 75 - 80°C Check around outdoor
unit.
Check outdoor unit air
passage.
Refer to 11-5.
i
"Check
of outdoor fan motor".
•
•
•
—
○
UB
P.C. board temperature Temperature of P.C. board
temperature thermistor on the inverter
P.C. board exceeds 70 - 75°C.
U8
Outdoor fan motor
—
Outdoor fan has stopped 3 times in a
row within 30 seconds after outdoor
fan start-up. Refer to 11-5.
i
"Check
of outdoor fan motor".
Refer to 11-5.
l
"Check
of inverter P.C. board".
•
—
○
FC
Nonvolatile memory data 5-time fl ash
2.5 seconds OFF Nonvolatile memory data cannot be
read properly. Replace the inverter
P.C. board. •
○ ○
U6
Power module 6-time fl ash
2.5 seconds OFF The interphase short circuit occurs
in the output of the intelligent power
module (IPM).
The compressor winding shorts circuit. Refer to 11-5.
a
"How
to check inverter/
compressor".
•
U7
Discharge temperature
—
Temperature of discharge temperature
thermistor has been 50°C or less for
20 minutes. Refer to 11-5.
k
"Check of LEV".
Check refrigerant
circuit and refrigerant
amount.
•
•
—
○
UJ
DC voltage 8-time fl ash
2.5 seconds OFF DC voltage of inverter cannot be
detected normally. Refer to 11-5.
a
"How
to check inverter/
compressor".
•
—
○
UH
Each phase current of
compressor 9-time fl ash
2.5 seconds OFF Each phase current of compressor
cannot be detected normally.
UO
Overcurrent Compressor
open-phase 10-time fl ash
2.5 seconds OFF Large current fl ows into intelligent
power module (IPM).
The open-phase operation of
compressor is detected.
The interphase short circuit occurs
in the output of the intelligent power
module (IPM).
The compressor winding shorts circuit. Reconnect
compressor connector.
Refer to 11-5.
a
"How
to check inverter/
compressor".
•
•
—
○
UE
Stop valve (Closed valve) 14-time fl ash
2.5 seconds OFF Closed valve is detected by
compressor current. Check stop valve •
○ ○
NOTE: Blinking patterns of this mode differ from the ones of Troubleshooting check table (11-3.).
OCH530