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[ IX Troubleshooting ]
- 212 -
HWE08040 GB
1. Error Code
Wrong number of connected units
2. Error definition and error detection method
The number of connected indoor units is "0" or exceeds the allowable value.
3. Error source, cause, check method and remedy
7102
Error source Cause Check method and remedy
Outdoor unit (1) Number of indoor units connected to the outdoor
terminal block (TB3) for indoor/ outdoor transmis-
sion lines exceeds limitations described below.
1) Check whether the number of units
connected to the outdoor terminal
block (TB3) for indoor/ outdoor
transmission lines does not exceed
the limitation. (See (1) and (2) on
the left.)
(2) Disconnected transmission line of the outdoor unit 2) Check (2) - (3) on the left.
(3) Short-circuited transmission line
When (2) and (3) apply, the following display will
appear.
3) Check whether the transmission
line for the terminal block for cen-
tralized control (TB7) is not con-
nected to the terminal block for the
indoor/outdoor transmission line
(TB3).
M-NET remote controller
Nothing appears on the remote controller be-
cause it is not powered.
MA remote controller
"HO" or "PLEASE WAIT" blinks.
(4) The model selection switch (SW5-7) on the out-
door unit is set to OFF. (Normally set to ON)
4) Check the setting for the model se-
lection switch on the outdoor unit
(Dipswitches SW5-7 on the outdoor
unit control board).
(5) Outdoor unit address setting error
The outdoor units in the same refrigerant circuit do
not have sequential address numbers.
Restriction on the number of units
Number of units
0 or 1
15 : P72 model
20 : P96 model
26 : P120 model
31 : P144 model
36 : P168 model
41 : P192 model
46 : P216 model
50 : P240 - 360 models
1 : 72 - 120 models
2 : 144 - 240 models
3 : P264 - 360 models
Total number of
indoor units
Total number of
LOSSNAY units
(During auto
address
start-up only)
Total number of
outdoor units