Mitsubishi Electric PURY-HP144, Service Handbook

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[7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ]
HWE18220_GB chapter 7 -
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7-8-13 Error Code [6607] Error Source Address = System Controller
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) Troubleshooting problems for system controllers
Error display
ME remote controller (RC), MA remote controller (MA)
Type of unit/controller in error
Part of the ME remote con-
trollers (RC) are experi-
encing problems.
All indoor units (IC) in the
same system are experi-
encing problems.
All ME remote controllers
(RC) are experiencing
problems.
Troubleshooting problems
for system controllers
Troubleshooting prob-
lems for all units (B)
Troubleshooting prob-
lems for all units (B)
&
Troubleshooting prob-
lems for all units (C)
Cause Check method and remedy
(1) Incidental cause 1) Turn off the power source of the outdoor unit for 5
minutes or more, and turn it on again.
(2) Faulty wiring of the transmission line for ME remote con-
troller 2) If not, check the causes (2) - (4).
(3) When the address of ME remote controller is changed in
the middle of the operation
(4) ME remote controller failure