[ IX Troubleshooting ]
- 162 -
HWE1018A 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.
The address setting for the indoor unit is incorrect.
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).
MA remote controller
"HO" is blinking.
(4) The indoor unit address is not set to an address
that equals "outdoor unit address minus 50."
4) Check items (4) on the left.
(5) The model selection switch (SW5-7) on the out-
door unit is set to OFF. (normally ON)
5) Check the setting of the model se-
lection switch (SW5-7 on the out-
door unit control board).
(6) Outdoor unit address setting error
The addresses of the outdoor units in the same re-
frigerant circuit are not consecutive.
Restriction on the number of units
Number of units
1 : 250, 500 model
1 : 250 model
2 : 500 model
Total number of
indoor units
Total number of
outdoor units
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