Mitsubishi Electric QUHZ-W40VA, Руководство по обслуживанию

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GHH15010
11
Abnormal point and
detection method
Case Check Code
Check LED
LED2
RED
8
times
8
times
9
times
9
times
10
times
10
times
Lit
6
times
Lit
7
times
LED1
GREEN
Judgment and action
E6
or
None
(1) Defective connector (CN641)
connection
(2) Defective (TH1)
a) Thermistor (TH1) disconnec-
tion
b) Thermistor (TH1) short circuit
(3) Defective outdoor inverter
p.c. board
Ɣ'HWHFWLRQPHWKRG'LVFRQQHF
-
tion or short circuit detected
Ɣ'LVFRQQHFWLRQ
°C or less
continued for 1 second 10
minutes onwards after start of
compressor operation
Ɣ6KRUWFLUFXLW
°C or less
continued for 1 second at all
times
Ɣ&RQQHFWRU&1
6KRUWFLUFXLWRUGLVFRQQHFWLRQRI
discharge temp. thermistor(TH1)
(1) Connect connector (CN641)
(2) Check the resistance value
and temperature of the
thermistor (TH1).
6HH+2:72&+(&.7+(
3$576
a) Replace thermistor (TH1)
b) Replace thermistor (TH1)
(3) Replace the outdoor inverter
p.c. board
(1) Defective connector (CN641)
connection
(2) Defective (TH2)
a) Thermistor (TH2) disconnec-
tion
b) Thermistor (TH2) short circuit
(3) Defective outdoor inverter
p.c. board
6KRUWFLUFXLWRUGLVFRQQHFWLRQRI
defrost temp. thermistor(TH2
）
Ɣ'HWHFWLRQPHWKRG'LVFRQQHF
-
tion or short circuit detected
Ɣ'LVFRQQHFWLRQ
°C or less
continued for 1 second at start
of compressor operation
Ɣ6KRUWFLUFXLW
°C or more
continued for 1 second at all
times
Ɣ&RQQHFWRU&1
(1) Connect connector (CN641)
(2) Check the resistance value
and temperature of the
thermistor (TH2).
6HH+2:72&+(&.7+(
3$576
a) Replace thermistor (TH2)
b) Replace thermistor (TH2)
(3) Replace the outdoor inverter
p.c. board
(1) Defective connector (CN643)
connection
(2) Defective (TH3)
a) Thermistor (TH3) disconnec-
tion
b) Thermistor (TH3) short circuit
(3) Defective outdoor inverter
p.c. board
6KRUWFLUFXLWRUGLVFRQQHFWLRQRI
ambient temp. thermistor(TH3)
Ɣ'HWHFWLRQPHWKRG'LVFRQQHF
-
tion or short circuit detected
Ɣ'LVFRQQHFWLRQ
°C or less
detected for 1 second at start of
compressor operation
Ɣ6KRUWFLUFXLW
°C or less
continued for 1 second at all
times
Ɣ&RQQHFWRU&1
(1) Connect connector (CN643)
(2) Check the resistance value
and temperature of the
thermistor (TH3).
6HH+2:72&+(&.7+(
3$576
a) Replace thermistor (TH3)
b) Replace thermistor (TH3)
(3) Replace the outdoor inverter
p.c. board
(1) Defective outdoor inverter
p.c. board
Abnormality of DC voltage
Ɣ'HWHFWLRQPHWKRG'HWHFWLRQRI
bus voltage abnormality
(1) Replace the outdoor inverter
p.c. board
(1) Defective fan motor
(2) Defective outdoor inverter
p.c. board
2YHUKHDWRI,QYHUWHUSFERDUG
temperature
Ɣ'HWHFWLRQPHWKRG%RDUG
temperature thermistor at 80°C
or more detected for 1 second
(1) Defective fan motor
(2) Replace outdoor inverter p.c.
board
times times
(1) Defective connector (CN664)
connection
(2) Defective (TH4)
a) Thermistor (TH4) disconnec-
tion
b) Thermistor (TH4) short circuit
(3) Defective outdoor inverter p.c.
board
6KRUWFLUFXLWRUGLVFRQQHFWLRQRI
hot water temp. thermistor
（
TH4
）
Ɣ'HWHFWLRQPHWKRG'LVFRQQHF
-
tion or short circuit detected
Ɣ'LVFRQQHFWLRQ
°C or less
continued for 1 second 10
minutes onwards after start of
compressor operation
Ɣ6KRUWFLUFXLW
°C or less
continued for 1 second at all
times
Ɣ&RQQHFWRU&1
(1) Connect connector (CN664)
(2) Check the resistance value
and temperature of thermistor
(TH4).
6HH+2:72&+(&.7+(
3$576
a) Replace thermistor (TH4)
b) Replace thermistor (TH4)
(3) Replace the outdoor inverter
p.c. board