Midea GA Series User manual

© 2021. Midea UK Copyright LTD.© 2021. Midea UK Copyright LTD.
GAME CHANGING
COOLING & HEATING
GA Series Ducted & CF Quick
Guide

© 2021. Midea UK Copyright LTD.
© 2021. Midea UK Copyright LTD.
Contents
Wiring Guides 3
Controllers
Commissioning / Dip Switches 14
Common Errors 2
Compatibility / Service sizes / Gas Charges 31
Midea YouTube Channel
PAGE
(Click for hyperlink)

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Wiring Guides
Single splits
Twin splits
XYE Adapter
(click for hyperlink)

4
Wiring Guide – Single S lits
HA HB
•Interconnecting power supply must be
locally isolated with a 5amp switch fuse
spur to protect the indoor PCB
•‘S’ must not be switched (crimp straight
through)
L,N,E
1L,2N,E,S L,N,E,S
Controller

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Twin S lit – Ducted / CF
5
•Interconnecting power supply must be locally
isolated with a 5amp switch fuse spur to protect
the indoor PCB
•Controller only wires to the Master
•Link Fan coils on XY terminals with 2 core CY
•The XYE adapter plug in is required to allow the
connection
•Master and Slave are set using SW5
SW5 Bit 1 ON for Master
SW5 Bit 1&2 ON for the Slave

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Twin S lit – Ducted / CF
6
CN49 socket connection XYE Ada ter
The adapters are an optional extra
They are free of charge
Once plugged into CN49 they allow twin comms wiring
and central controller wiring:
X - Green
Y - Yellow

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Controller Guides
Models and Compatibility
Wiring
Wifi HUB
MSmart Home App
Central Controller Wiring
(click for hyperlink)

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KJR120 Controllers
8
The KJR120G features a day timer, information enquiry and follow me
functions
It has 3 distinct versions listed below
The KJR120X is a new controller which has the same features as the
KJR120G with the added ability to change the limits of set points and
other parameters
Model KJR120G2/TFBG-E KJR-120G/TF-E-01 KJR-120G/TF-E-01 KJR120X
Midea Ref. KJR120G2 – P&P KJR120G2 – S2 KJR120G – M2 KJR120X
Wiring Jack plugged 2 core HA/HB 2 core HA/HB 2 core HA/HB
# of units 1 1 1-16 1-16
Bom codes 1 31 100A25533 1 31 100A31648 1 31 100A255 3

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KJR120G S2/M2 & KJR120X
9
HA HB HA HB HA HB
•2 core CY 0.5mm-1/5mm connection between controller and unit(s)
•When controlling more than one system, the units must be addressed using the Rotary
Dial S1 switch on the indoor PCB
•Both the HA/HB and Jack plug versions of the controllers look very similar except for
the fly lead that is connected to the bottom of the jack plugged version. Bear this in
mind when attempting to wire the controllers. The jack plugged version cannot be
connected using HA/HB even though the terminals are present

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Wifi Hub Installation
10
CN49
CN49

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Wifi Hub Installation
11
Use the infra red controller to enter the hub into AP mode
•Press the LED Display button (any infra red controller with
LED button can be used) times
•On each press the faint light with flash on the hub (no
indication is given on the unit)
•Once the hub is in AP mode the light will flash of its own
accord). Follow the steps on the mobile app to complete the
registration

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MSmart Home Set u
12
Video Link

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Central Controller Installation
13
All split systems come with the ability to connect to a central controller. THE XYE ADAPTER IS REQUIRED FOR DUCTED AND CF UNITS
Split systems are linked via XYE terminals on indoor pcb (3 core 0. 5 CY cable – standard for Midea VRF)
Addresses are set using the applicable switches on the indoor pcb

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Commissioning and
Parameter Settings
Forced Cooling Mode Twin Split Settings
Anti Cold Air Function Fan Set Point Control
Auto Restart CC Address
Heating Temperature Compensation Remote ON/OFF
Alarm Output 230v Output
(click for hyperlink)

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Forced Cooling Mode
15
Breezeless Dis lay Com act Dis lay
GA series systems can be forced into cooling mode by pressing the MANUAL button twice. The system will run
at 80% frequency and ignore any ambient thermistor readings
Ducted Dis lay

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SW8/SW5 – Twin S lit Setting
16
Both Master (first one connected to the condenser) and Slave need their status set
using SW8 –
Master SW8/SW5 Bit 1 ON
Slave SW8/SW5 Bit 1 & 2 ON
Slave units will do exactly what the Master is set for and become totally ignorant to
any form of control. Therefore no settings or controller wiring (remote on-off/central
controller address and wiring etc) need to be changed or added to the slave
Hard wired controllers only need to be wired to Master

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SW1 – Anti Cold Air Function
1
SW1 is used to set what coil
temperature the indoor fan motor
starts at in heating mode
This is particularly effective at
preventing cold drafts after a defrost
cycle for example

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SW2-1 – Fan Set Point Control
18
Factory Setting
SW2 Bit 1 – OFF
Fan OFF (in 120s)
O tional Setting
SW2 Bit 1 – ON
Fan Runs On Indefinitely
SW2 Bit 1 is used to select what happens to the indoor fan when the unit
reaches set point and the compressor stops

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SW3 – Auto Restart
19
Factory Setting
SW3 – OFF
Auto Restart ACTIVE
O tional Setting
SW3 – ON
Auto Restart INACTIVE
SW3 is used to determine if the unit automatically starts again after a loss of
power

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S1 & S2 – CC Address
20
Indoor units connected to controller via
XYE terminals
S2 and S1 work together to provide 64
unique addresses
Refer to the table for address settings
NOTE – there is no need to change the
default address unless there is a central
controller connected. This applies to
twin systems and units connected to
one controller