Specifications

-169-
Checking
code
6607
(continued)
Meaning, detecting method
System
compo-
sition
Generating
unit address
Display of
trouble
Detecting
method
Cause Checking method & countermeasure
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).
Outdoor
unit (OC)
Indoor
unit (IC)
Remote
controller
(RC)
Remote
control-
ler (RC)
Remote
control-
ler (RC)
Remote
control-
ler (RC)
No reply
(ACK) at
OC
transmis-
sion to BC
No reply
(ACK) at IC
transmis-
sion to RC
No reply
(ACK) at
RC
transmis-
sion to IC
As same that for single refrigerant system.
1) Cause of 1) ~ 5) of “Cause for single refriger-
ant system”.
2) Disconnection 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
re-frigerant system.
4) Neglecting
6) The transmission booter is defective, has
disconnecitede wires, or the power has been
cut-off.
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)
Same as measure for single refrigerant
system.
a) Shut down the power source of both
IC and OC for over 5 minutes simul-
taneously, and make them again.
Normal state will be returned incase
of accidental trouble.
b) Check for 1) ~ 5) of causes. If cause
is found, remedy it.
c) Check other remote controller or OC
unit LED for troubleshooting for
trouble.
Trouble:
Modify the trouble ac-
cording to the content
of check code.
No trouble: Faulty indoor con-
troller
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.
b) Check for 1) ~ 5) of causes. If cause
is found, remedy it.
When normal state can not be ob-
tained, check 1) ~ 5) of causes.
(2) Group operation system using plural refrigerants
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)
6) The transmission booster is defective, has dis-
connected wires, or the power has been cut-
off.
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2
2
3