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[ IX Troubleshooting ]
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HWE0803A 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 con-
nected to the outdoor terminal block
(TB3) for indoor/ outdoor transmission
lines does not exceed the limitation. (See
(1) and (2) on the left.)
2) Check (2) - (3) on the left.
3) Check whether the transmission line for
the terminal block for centralized control
(TB7) is not connected to the terminal
block for the indoor/outdoor transmission
line (TB3).
4) Check the setting for the model selection
switch on the outdoor unit (Dipswitches
SW5-7 on the outdoor unit control board).
(2) Disconnected transmission line from the outdoor
unit or BC controller
(3) Short-circuited transmission line
When (2) and (3) apply, the following display will
appear.
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)
(5) Outdoor unit address setting error
The outdoor units in the same refrigerant circuit do
not have sequential address numbers.
(6) In a system with the P700 models of units or larger,
a BC controller other than the HA-type is used as
the main BC controller.
Restriction on the number of units
Number of units
0 or 1
0 or 1
1
(P72- P120 models only)
0,1 or 2
1 - 18 : P72 model
1 - 24 : P96 model
1 - 30 : P120 model
1 - 36 : P144 model
1 - 42 : P168 model
1 - 48 : P192 model
2 - 50 : P216 model
2 - 50 : P240 model
1 : P72 - P120 models
2 : P144 - P240 models
Total number of indoor units
Total number of LOSSNAY
units (During auto address
start-up only)
Number of Sub BC controllers
Number of
Main BC controllers
Number of BC controllers
Total number of outdoor units