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 34 

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RUN lamp

1 time flash

2 time flash

6 time flash

TIMER lamp

1 time flash

2 time flash

4 time flash

Outdoor unit LED

OFF

OFF

OFF

Heat exchanger thermistor error

Room temperature thermistor error

Indoor fan motor error

¡

Broken heat exchanger thermistor wire, connector
poor connection

¡

Broken room temperature thermistor wire,
connector poor connection

¡

Defective fan motor, connector poor connection

Trouble

Cause

OFF

OFF

OFF

Outdoor temperature thermistor

error

Outdoor unit heat exchanger
thermistor error

Discharge pipe thermistor error

¡

Broken outdoor thermistor wire, connector poor
connection

¡

Broken heat exchanger thermistor wire, connector
poor connection

¡

Broken discharge pipe thermistor wire, connector
poor contact

1 time flash

2 time flash

5 time flash

6 time flash

1 time flash

2 time flash

5 time flash

6 time flash

Current cut

Outdoor unit error

Compressor overheat

Serial signal transmission error

¡

Compressor faulty

¡

Overload operation (51C operation)

¡

Gas shortage.

¡

Defective discharge pipe thermistor.

¡

Compressor lock.

¡

Closed service valve.

¡

Broken signal wire.

¡

Defective indoor/outdoor unit PCB.

(3)

Inspection procedures corresponding to detail of trouble

Thermistor error

[Broken thermistor wire,
connector poor connection]

(Shortcircuit)

(Broken wire)

Is connector connection good?

YES

YES

NO

NO

Replace PCB.

Correct connection.

Replace thermistor.

Is thermistor resistance value good?

◆

 Thermistor temperature characteristics

(Room temp., indoor unit heat exchanger
temp., outdoor unit heat exchanger
temp., outdoor temp.)

Temperature (˚C)

Resistance (k

Ω

)

30

25

20

15

10

5

30

20

10

40

50

60

70

0

–10

Temperature (˚C)

Resistance (k

Ω

)

Temperature (˚C)

Resistance (k

Ω

)

0

164

70

8.7

5

127

75

7.3

10

99

80

6.2

15

78

85

5.3

20

62

90

4.5

25

50

95

3.9

30

40

100

3.3

35

32

105

2.9

40

26

110

2.5

45

21

115

2.2

50

17

120

1.9

55

14

125

1.6

60

12

130

1.4

65

10

135

1.3

◆

 Discharge pipe thermistor temperature characteristics

(2)

Self diagnosis display on indoor unit

TIMER lamp

ON

RUN lamp
keeps flashing

RUN lamp

ON

Опубликовано TopClimat