Error Code [6607] Error Source Address = Outdoor Unit (Oc) - Mitsubishi Electric PUHY-HP72 Service Handbook

[7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ]
7-8-8

Error Code [6607] Error Source Address = Outdoor Unit (OC)

1. Error code definition
No ACK error
2. Error definition and error detection method
The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans-
mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.)
The address/attribute appeared on the display on the remote controller indicates the controller which did not provide
the response (ACK).
3. Cause, check method and remedy
(1) Incidental cause
(2) Contact failure of transmission line of OC or IC
(3) Decrease of transmission line voltage/signal by exceed-
ing acceptable range of transmission wiring.
Farthest: 200 m [656ft] or less
Remote controller wiring:
10m [32ft] or less
(4) Erroneous sizing of transmission line (Not within the
range below).
Wire diameter:
2
1.25mm [AWG16] or more
(5) Outdoor unit control board failure
HWE18240_GB
Cause Check method and remedy
1) Turn off the power source of the outdoor unit, and
turn it on again.
2) If the error is accidental, it will run normally. If not,
check the causes (2) - (5).
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