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Checking
code
Meaning, detecting method
No ACK error When no ACK signal is detected in 6 continuous times with 30 second interval by transmission
side controller, the transmission side detects error.
Note: The address/attribute shown on remote controller indicates the controller not
providing the answer (ACK).
Generating
unit address
Display
of trouble
Detecting
method
No reply
(ACK) at IC
transmission
to OC
No reply
(ACK) at
RC
transmission
to IC
No reply
(ACK) at IC
transmission
to RC
Remote
controller
(RC)
Remote
controller
(RC)
Remote
controller
(RC)
System
compo-
sition
1Outdoor
unit (OC)
2Indoor
unit (IC)
3Remote
controller
(RC)
6607
(continued)
(2) Group operation system using plural refrigerants
Same as measure for single refriger-
ant system
a) Shut down the power source of
both IC and OC for over 5 minutes
simultaneously, and make them
again.
Normal state will be returned in-
case of accidental trouble.
If it does not return to normal, follow
b).
b) Check for 1) ~ 5) of causes. If cause
is found, remedy it. If no cause is
found, follow c).
c) Check other remote controller or
OC unit LED for troubleshooting for
trouble.
Trouble → Modify the trouble ac-
cording to the con
tent
of check code.
No trouble
→
Faulty indoor controller
a) Shut down the power source of OC
for over 5 minute, and make it again.
Normal state will be returned in
case of accidental trouble.
If it does not return to normal, follow
b).
b) Check for 1) ~ 5) of causes. If cause
is found, remedy it. If no cause is
found, follow c).
c) Same as that of c) for IC unit
When normal state can not be ob-
tained, check 1) ~ 5) of causes.
Cause Checking method & countermeasure
As same that for single refrigerant system
1) Cause of 1) ~ 5) of “Cause for single refriger-
ant system”
2) Slipping off or short circuit of transmission
line of OC terminal block for centralized
control (TB7)
3) Shut down of OC unit power source of one re-
frigerant system
4) Neglecting insertion of OC unit power supply
connector (CN40)
5) Inserting more than 2 sets of power supply
connector (CN40) for centralized control use.
For generation after normal operation conduct-
ed once, the following causes can be consider-
ed.
•Total capacity error (7100)
•Capacity code setting error (7101)
•Connecting set number error (7102)
•Address setting error (7105)
1) Cause of 1) ~ 3) of “Cause for single refri-
gerant system”
2) Slipping off or short circuit of transmission
line of OC terminal block for centralized con-
trol (TB7)
3) Shut down of OC unit power source of one
refrigerant system
4) Neglecting insertion of OC unit power supply
connector (CN40)
5) Inserting more than 2 sets of power supply
connector(CN40) for centralized control use
At generation after normal operation conducted
once, the following causes can be considered.
•Total capacity error (7100)
•Capacity code setting error (7101)
•Connecting set number error (7102)
•Address setting error (7105)
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