Mitsubishi MT300 - Summary Of The Function Of The Terminals On Pcb Aa22

Installation
'10 • HM-T-149A
36
Summary of the function of
the terminals on PCB AA22
1 2
1
2
3
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
1 2 3
1 6 2
4 5 6 7 8 9 10 11 12 13 14 15 16
BT1
*
Outdoor
air
sensor
External
thermostat
on timer
for
system 1
External
thermostat
on timer
for
system 2
Tariff A
X1 : AA22
X2 : AA22
X6 : AA22
X4 : AA22
External extra
hot water input
Room temp.
sensor
EP21 - BT3
Temp. sensor
return line
heating system 2
EP21 - BT2
Temp. sensor
supply line
heating system 2
X1
X2
R24 - 26
Tariff B L1 L2 L3
Current
sensor
(3phase
only)
MH-RG10
1
2
3
4
X4
X6
Optional other than
outdoor air sensor (BT1) and
current sensor (L1, L2 and L3)
XR2
XR3
~
XR2:Alarm output (no voltage contactor)
XR3:Operation output (no voltage contactor)
Be sure that MH-RG10 is
connected to Terminal X4 on AA22
correctly as it is shown.
4 3 2 1
X101
on Tank(HMS140V)
Iutdoor unit installation
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74
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