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[ IX Troubleshooting ]
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HWE09080 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
Heat source
unit
(1) Number of indoor units connected to the heat
source terminal block (TB3) for indoor-heat source
transmission lines exceeds limitations described
below.
1) Check whether the number of units con-
nected to the heat source terminal block
(TB3) for indoor-heat source 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-heat source transmis-
sion line (TB3).
4) Check the setting for the model selection
switch on the heat source unit (Dipswitch-
es SW5-7 on the heat source unit control
board).
(2) Disconnected transmission line from the heat
source 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 heat
source unit is set to OFF. (Normally set to ON)
(5) Heat source unit address setting error
The heat source units in the same refrigerant cir-
cuit do not have sequential address numbers.
(6) A type-G BC controller is connected to a unit P144
model or above.
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 - 15 : P72 model
1 - 20 : P96 model
1 - 26 : P120 model
1 - 31 : P144 model
1 - 36 : P168 model
1 - 41 : P192 model
2 - 46 : P216 model
2 - 50 : P240 - P360 models
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 - P240 models
1 : P72 - P120 models
2 : P144 - P240 models
3 : P264 - P360 models(PQHY only)
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 heat source
units
<PQHY>
<PQRY>