Mitsubishi Heavy Industries SRK25GZ-L1 Handbook page 363

7
Defective outdoor temperature thermistor
Outdoor unit
Red LED 2 time flashes
Green LED 1 time flash
Is the outdoor
air temperature thermistor
connector connection
OK?
NO
Repair
8
Defective discharge gas thermistor (Only case of FDC(P)208~508 type)
Outdoor unit
Red LED 3 time flashes
Green LED 1 time flash
Is the
discharge gas thermistor
connector connection
OK?
NO
Repair
Is the outdoor
YES
temperature thermistor
characteristics OK, is there
no broken wire?
NO
Defective outdoor tempera-
ture thermistor
Replacement
Are the discharge
YES
gas thermistor characteristics
OK, is there no
broken wire?
NO
Defective discharge gas
thermistor Replacement
Defective outdoor unit PCB
YES Replacement (Defective outdoor
temperature thermistor input
circuit)
Temperature-resistance
characteristics of outdoor
temperature thermistor (Th
400
300
200
T < 0°C
=
100
0
0°C
–50°C
Temperature [T]
Defective outdoor unit PCB
YES
Replacement (Defective dis-
charge gas thermistor input
circuit)
Temperature-resistance
characteristics of discharge
gas thermistor (Th
100
T < 80°C
50
0
0°C 20°C 50°C
Temperature [T]
FDT ( N ) -H
A)
O-
40
30
20
T > 0°C
=
10
0
50°C
D)
O-
10
T > 80°C
5
0
80°C 100°C 120°C
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