Mitsubishi Electric PURY-80TMU Service Handbook page 107

(3) System error
Checking
Meaning, detecting method
code
7100 Total capacity error
Total capacity of indoor units in
the same refrigerant system ex-
ceeds limitations.
Trouble source:
Outdoor unit
7101 Capacity code error
Error display at erroneous con-
nection of Indoor unit of which
model name can not be con-
nected.
Trouble source :
Outdoor unit
Indoor unit
7102 Connected unit count over
Number of units connected in the
same refrigerant system exceeds
limitations.
Trouble source:
Outdoor unit
Cause
1) Total capacity of indoor units in the
same refrigerant system exceeds
the following:
Model Total capacity Total capacity code
PURY-80(-A) 120
PURY-100(-A) 150
2) Erroneous setting of OC model se-
lector switch (SW3-10).
ON ..... 100(-A)
OFF ... 80(-A)
1 2 3 4 5 6 7 8 9 10
SW3
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 termi-
nal block (TB3) for outdoor/indoor
transmission line exceeds limita-
tions given be-lows:
Item Limitation
1 Total of
1~15 (PURY-80(-A))
Indoor unit 1~16 (PURY-100(-A))
2 Total of Indoor
1~35
unit & RC
3 Total of BC
1
controller
–106–
Checking method & Countermeasure
a) Check for the model total (capacity cord total) of
indoor units connected.
b) Check whether indoor unit capacity code (SW2)
is wrongly set.
For erroneous switch setting, modify it, turn off
62
power source of outdoor unit, and indoor unit
78
simultaneously for 5 minutes or more to modify
the switch for setting the model name (capacity
coad).
Check for the model selector switch (Dip switches
SW3-10 on outdoor unit control circuit) of OC.
a) Check for the model name of the Indoor unit
connected.
b) Check for the switch (SW2 if indoor controller
for setting of Indoor unit model name of gener-
ating address. When it is not agreed to the model
name, modify the capacity code while shutting
off the power source of Indoor unit.
* The capacity of Indoor unit can be confirmed by
the self-diagnosios 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).