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Error Code [6607] Error Source Address = Indoor Unit (Ic) - Mitsubishi Electric PURY-HP72 Service Handbook

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[7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ]
7-8-10

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 op-
eration.
(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 connected 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
HWE13080
Grouped operation of multi-
ple refrigerant systems
Troubleshooting problems
for indoor units (A)
&
Troubleshooting problems
for all units (A)
Cause
Cause
System controller (SC)
Types of indoor units experiencing
problems
Part of the indoor units
All indoor units (IC) in
(IC) are experiencing
the same system are
problems.
experiencing problems.
Troubleshooting prob-
Troubleshooting prob-
lems for indoor units (A)
lems for indoor units (B)
Check method and remedy
1)
Turn off the outdoor/indoor units for 5 or more min-
utes, 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
Check voltage of the transmission line for central-
ized control.
20 V or more: Check (1) on the left.
Less than 20 V: Check (2) on the left.
- 228 -
All indoor units (IC) are
experiencing problems.
Troubleshooting prob-
lems for indoor units (B)
&
Troubleshooting prob-
lems for all units (A)
GB

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