Mitsubishi Electric PUHY-HP120TNU-A, Service Handbook

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[7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ]
HWE18240_GB chapter 7 -
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7-8-13 Error Code [6607] All Error Source Addresses
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 all units (A)
(2) Troubleshooting problems for all units (B)
(3) Troubleshooting problems for all units (C)
Cause Check method and remedy
(1) Disconnection or short circuit of the transmission line for
the outdoor unit on the terminal block for centralized con-
trol line connection (TB7) 1) Check the causes of (1) - (4). If the cause is found,
correct it. If no cause is found, check 2).
(2) When multiple outdoor units are connected and the pow-
er source of one of the outdoor units has been shut off. 2) Check the LED displays for troubleshooting on oth-
er remote controllers whether an error occurs.
(3) The male power supply connector of the outdoor unit is
not connected to the female power supply switch connec-
tor (CN40).
Œ
When an error is present
Check the causes of the error indicated by the
error codes listed in item (4) in the "Cause" col-
umn.
Œ
When no errors are present
Indoor unit circuit board failure
(4) The male power supply connectors on 2 or more outdoor
units are connected to the female power supply switch
connector (CN40) for centralized control.
If an error occurs, after the unit runs normally once, the
following causes may be considered.
Œ
Total capacity error (7100)
Œ
Capacity code error (7101)
Œ
Error in the number of connected units (7102)
Œ
Address setting error (7105)
Cause Check method and remedy
(1) Total capacity error (7100) 1) Check the LED display for troubleshooting on the
outdoor unit.
Œ
When an error is present
Check the causes of the error indicated by the
error codes listed in items (1) through (4) in the
"Cause" column.
Œ
When no errors are present
Check the causes of the error indicated by the
error codes listed in items (5) through (7) in the
"Cause" column.
(2) Capacity code error (7101)
(3) Error in the number of connected units (7102)
(4) Address setting error (7105)
(5) Disconnection or short circuit of the transmission line for
the outdoor unit on the terminal block for centralized con-
trol line connection (TB7)
(6) Turn off the power source of the outdoor unit
(7) Malfunction of electrical system for the outdoor unit
Cause Check method and remedy
(1) When the power supply unit for transmission lines is used
and the male power supply connector is connected to the
female power supply switch connector (CN40) for the
transmission line for centralized control Check the causes of the error indicated by the
error codes listed in items (1) through (3) in the
"Cause" column.
(2) Disconnection or shutdown of the power source of the
power supply unit for transmission line
(3) System controller (MELANS) malfunction