Error Code [6607] Error Source Address = Indoor Unit (Ic) - Mitsubishi Electric R410A Service Handbook

[7-7 Error Code Definitions and Solutions: Codes [6000 - 6999] ]
7-7-9

Error Code [6607] Error Source Address = Indoor Unit (IC)

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
Error display
ME remote controller (RC), MA remote controller (MA)
Types of refrigerant
systems
Single refrigerant system
Troubleshooting prob-
lems for indoor units (A)
(1) Troubleshooting problems for indoor units (A)
(1) Incidental cause
(2) When IC unit address is changed or modified during
operation.
(3) Faulty or disconnected IC transmission wiring
(4) Disconnected IC connector (CN2M)
(5) Indoor unit controller failure
(6) ME remote controller failure
(2) Troubleshooting problems for indoor units (B)
(1) When the power supply unit for transmission lines is
used and the male power supply connector is con-
nected to the female power supply switch connector
(CN40) for the transmission line for centralized control
(2) Disconnection or shutdown of the power source of the
power supply unit for transmission line
(3) System controller (MELANS) malfunction
(4) The TLMU outdoor unit's central control connector
(CN40) is inserted.
HWE14080
Grouped operation of multi- Types of indoor units experiencing
ple refrigerant systems problems
Part of the indoor units
Troubleshooting problems Troubleshooting prob-
for indoor units (A) lems for indoor units (A)
&
Troubleshooting problems
for all units (A)
Cause
Cause
- 211 -
System controller (SC)
All indoor units (IC) in
(IC) are experiencing the same system are
problems. experiencing problems.
Troubleshooting prob-
lems for all units (B)
Check method and remedy
1) Turn off the outdoor/indoor units for 5 or more minutes,
and turn them on again.
2) If the error is accidental, it will run normally. If not, check
the causes (2) - (6).
Check method and remedy
1) Check voltage of the transmission line for centralized con-
trol.
20 V or more: Check (1) on the left.
Less than 20 V: Check (2) on the left.
2) Check the causes of the error indicated by the error codes
listed in items (1) through (3) in the "Cause" column.
3) When the male power supply connector is connected from TLMU
outdoor unit to CN40, the power supplied to TB7 side even when
the main power of the TLMU outdoor unit is switched off, and the
System controller may store an error in the error history and emit
an alarm signal.
All indoor units (IC) are
experiencing problems.
Troubleshooting prob-
lems for indoor units (B)
&
Troubleshooting prob-
lems for all units (B)
GB