Error Code [6602]; Error Code [6603] - Mitsubishi Electric PUHY-P250YNW-A Service Handbook

[7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ]
7-8-4 Error Code [6601]
1. Error code definition
Polarity setting error
2. Error definition and error detection method
The error detected when transmission processor cannot distinguish the polarities of the M-NET transmission line.
Detail code 001: Detection of polarity setting error in centralized control system
Detail code 002: Detection of polarity setting error in indoor unit system
3. Cause, check method and remedy
(1) No voltage is applied to the M-NET transmission line
that AG-150A/GB-50ADA/PAC-YG50ECA/BAC-
HD150 are connected to.
(2) M-NET transmission line to which AG-150A/GB-
50ADA/PAC-YG50ECA/BAC-HD150 are connected
is short-circuited.
(3) When two or more power supplies are connected to
the M-NET
BS_07_C
Cause Check method and remedy
Check if power is supplied to the M-NET transmission
line of the AG-150A/GB-50ADA/PAC-YG50ECA/BAC-
HD150, and correct any problem found.
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