50
Error Code
Abnormal points and detection method
Case Judgment and action
A0
(6600)
Address duplicate definition
This error is displayed when transmission
from the units of same address is detected.
Note) The address and attribute displayed
at remote controller indicate the con-
troller that detected abnormality.
1 There are 2 or more same
address of controller of out-
door unit, indoor unit, FRESH
MASTER, or LOSSNAY.
2 Noise has entered into trans-
mission signal and signal was
transformed.
Search the unit with same address as abnor-
mality occurred. If the same address is found,
shut the power supply of outdoor unit and
indoor unit and FRESH MASTER or LOSSNAY
at the same time for 2 minutes or more after
the address is corrected, and turn the power on
again.
Check transmission waveform or noise on
transmission wire.
A2
(6602)
Hard ware error of transmission
processor
Transmission processor intended to trans-
mit “0”, but “1” appeared on transmission
wire.
Note) The address and attribute display at
remote controller indicate the con-
troller that detected abnormality.
1
Error is detected if waveform is
transformed when wiring works
of transmission wire of out-
door unit, indoor unit, FRESH
MASTER or LOSSNAY are
done, or polarity is changed
with the power on and trans-
mission data collide each other.
2
Defective transmitting receiving
circuit of transmission processor
3 Transmission data is changed
by the noise on transmission.
1 If the works of transmission wire is done
with the power on, shut off the power supply
of outdoor unit and indoor unit and FRESH
MASTER or LOSSNAY at the same time for
2 minutes or more, and turn the power on
again.
2 Check transmission waveform or noise on
transmission wire.
A3
(6603)
BUS BUSY
1. Overtime error by collision damage
Abnormal if transmitting is not possible
for 8-10 minutes continuously because
of collision of transmission.
2. Data could not reach transmission wire
for 8-10 minutes continuously because
of noise or etc.
Note) The address and attribute displayed
at remote controller indicate the con-
troller that detected abnormality.
1 Transmission processor could
not transmit signal because
short cycle voltage of noise
and the like have entered into
transmission wire continuously.
2
Transmission quantity has
increased and transmission is
not possible because there was
wiring mistake of terminal block
for transmission wire (TB3) and
terminal block for central con-
trol (TB7) in outdoor unit.
3 Transmission are mixed with
others and occupation rate
on transmission wire rose
because of defective repeater
(a function to connector or dis-
connect transmission of control
and central control system) of
outdoor unit, then abnormality
is detected.
1 Check if transmission wire of indoor unit,
FRESH MASTER, LOSSNAY, or remote con-
troller is not connected to terminal block for
central control (TB7) of outdoor unit.
2 Check if transmission wire of indoor unit,
FRESH MASTER or LOSSNAY is not con-
nected to terminal block for transmission wire
of outdoor unit.
3 Check if terminal block for transmission wire
(TB3) and terminal block for central control
(TB7) is not connected.
4 Check transmission waveform or noise on
transmission wire.
<M-NET communication error>
(Note) “Indoor unit” in the text indicates M-NET board in outdoor unit.
A6
(6606)
Communication error with communica-
tion processor
Defective communication between unit
processor and transmission processor
Note) The address and attribute display at
remote controller indicate the con-
troller that detected abnormality.
1 Data of transmission proces-
sor or unit processor is not
transmitted normally because
of accidental trouble such as
noise or thunder surge.
2 Address forwarding from unit
processor is not transmitted
normally because of defective
transmission processor hard-
ware.
Turn off the power supply of outdoor unit,
indoor unit and FRESH MASTER or LOSSNAY
at the same time for 2 minutes or more, and
turn the power on again. System returns nor-
mally if abnormality was accidental malfunc-
tion. If the same abnormality generates again,
abnormality-generated controller may be defec-
tive.
To Next Page
Loading...
Need help?
General
