Friedrich MW09Y3FM Service Manual page 17

OUTDOOR UNIT LEDS
Communication error (indoor unit A to outdoor unit)
Communication error (indoor unit B to outdoor unit)
Communication error (indoor unit C to outdoor unit)
Communication error (indoor unit D to outdoor unit)
Discharge pipe temperature sensor
Outdoor heat exchanger temperature sensor
Outdoor temperature sensor
Outdoor 2way valve(A) temperature sensor
Outdoor 2way valve(B) temperature sensor
Outdoor 2way valve(C) temperature sensor
Outdoor 2way valve(D) temperature sensor
Outdoor 3way valve(A) temperature sensor
Outdoor 3way valve(B) temperature sensor
Outdoor 3way valve(C) temperature sensor
Outdoor 3way valve(D) temperature sensor
Compressor temperature sensor
Heatsink temperature sensor
Pressure switch A abnormal
Pressure switch B abnormal
Indoor unit connection capacity error
IPM error
Comoressor loter location error
Compressor can not start to operate
Outdoor fan (upper) motor error
Outdoor fan (lower) motor error
Microcomputer error
: Slow flashing - : Off
2006.03.23
LED 1 LED 2
1 time
1 time
2 times
3 times
4 times
5 times
5 times
6 times
6 times
7 times
8 times
9 times
10 times
11 times
12 times
13 times
14 times
15 times
16 times
17 times
16
LED 3 LED 4
1 time
1 time
5 times
5 times
6 times
6 times