Friedrich AS - W126BMS0, Service Manual

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Part 4 Trouble Shooting
7. Self-diagnosis Function
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Error Indicator
• The function is to self-diagnosis airconditioner and express the troubles identically if there is any trouble.
• If more than two troubles occur simultaneously, primarily the highest trouble of error code is expressed.
• After error occurrence, if error is released, error LED is also released simultaneously.
• To operate again on the occurrence of error code, be sure to turn off the power and then turn on.
• Having or not of error code is different from Model.
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Indoor Unit Error
1. SW, SB, SC, SH, S4, S5 Chassis
1) SW, SB, SC, Chassis 2) S4, S5 Chassis (4 LED Model)
1 Digit
10 Digit
LED1
(1 Digit)
LED2
(10 Digit)
Ex) Error Code 5 (Communication Failure)
LED1
(1 Digit)
LED2
(10 Digit)
LED1
(1 Digit)
LED2
(10 Digit)
3) SH Chassis
2. SE Mirror, S8, SD, SM, SN Chassis
Error
code
Description
Error indication
Indoor unit
LED1 LED2
1 Indoor Sensor (Air) open/short 1 Time -
2 Indoor Sensor (Entry Pipe) open/short 2 Times -
4 Float Switch Error 4 Times -
5
Communication Failure (Indoor Unit
↔
Outdoor Unit)
5 Times -
6 Indoor Sensor (Exit Pipe) open/short 6 Times -
9 EEPROM ERROR (Indoor Unit) 9 Times -
10 Indoor Unit Fan Lock (Operation Failure) - 1 Time
12 Indoor Sensor (Middle Pipe) open/short 2 Times 1 Time