Mitsubishi Electric PUHY-P200 Service Handbook page 121

3. System error
Checking
Meaning, detecting method
code
7100 Total capacity abnormality
Total capacity of indoor units in the
same refrigerant system exceeds
limitations.
Trouble source :
Outdoor unit
7101
Capacity code abnormality
Error display at erroneous
connection of Indoor unit of which
model name can not be connected.
Trouble source :
Outdoor unit
Indoor unit
7102 Error in the number of connected
units
Number of units connected in the
same refrigerant system exceeds
limitations.
Trouble source:
Outdoor unit
Address setting abnormality
7105
• Erroneous setting of OC unit
address
Trouble source:
Outdoor unit
Cause
(1) Total capacity of indoor units
in the same refrigerant
system exceeds the
following:
Total
Model
capacity
P200 260
P250 325
P300 390
P350 455
P400 520
P450 585
P500 650
P550 715
P600 780
P650 845
(1) The Indoor unit model name
(model code) connected is
not connectable.
Connectable range :
20 ~ 250
(2) Erroneous setting of the
switch (SW2) for setting of
model name of indoor unit
connected.
(1) Number of unit connected to
terminal block (TB3) for
outdoor/indoor transmission
line exceeds limitations
given below:
Number
Item
of units
1~13 : P200 type
1) Total
number of
1~16 : P250 type
indoor units
1~19 : P300 type
1~20 : P350 type
1~22 : P400 type
1~24 : P450~P550
types
1~32 : P600,P650
types
2) Number of
LOSSNAY
units
(Only when
0 or 1
the free
address is
set.)
(2) Disconnection of transmission
wiring at outdoor unit.
(3) Short circuit of transmission
line in case of (2) and (3),
remote controller displays
"HO".
(1) Setting error of outdoor unit
address.
The address of outdoor unit
is not being set to 51 ~ 100.
- 119 -
Checking method & Countermeasure
(a) Check for the model total (capacity
cord total) of indoor units connected.
(b) Check for the switch (SW2 on
indoor controller board) for setting
of the model name of the indoor unit
connected.
For erroneous switch setting, modify
it, turn off power source of outdoor
unit, and indoor unit simultaneously
for 5 minutes or more to modify the
switch for setting the model name
(capacity code).
(a) Check for the model total (capacity
cord total) of indoor units connected.
(b) Check for the switch (SW2 on
indoor controller board) for setting
of Indoor unit model name of
generating address. When it is not
agreed to the model name, modify
the capacity code while shutting off
the power source of both Indoor and
outdoor units.
✻ The capacity of Indoor unit can
be confirmed by the self-
diagnosis function (SW1
operation) of indoor unit.
(a) Check whether the connection of
units to the terminal block for
indoor/outdoor transmission wiring
(TB3) of outdoor unit is not
exceeding the limitation.
(See (1) ~ (2) left.)
(b) Check for (2), (3), and (4).
(c) Check for the connection of
transmission wiring to the terminal
block for centralized control is
erroneously connected to the
indoor/outdoor transmission wiring
terminal block (TB3).
(d) Check for the model total (capacity
code total) of indoor units
connected.
Check that the address of OC unit is
being set to 51 ~ 100.
Reset the address if it stays out of the
range, while shutting the power source
off.