Air-Con Multi Split

This is the support page for the 22-21 SEER Air-Con Multi Split line. If you're looking for our 16 SEER models please visit the Air-Con Multi Split 16 SEER page.

Multi Split Series

Multi Zone Mini Split Line
Voltage	220V
SEER Rating	21-22
Capacities (Outdoor Unit)	18,000 - 42,000 BTU
Capacities (Indoor Unit)	9,000 - 24,000 BTU
Heat Pump?	Yes
Model Sold From	June 2017 - July 2022

Indoor Units (Wall Mount Type)

• AMTEM4H4R09
• A16EW4H4R09 (Legacy)
• AMTEM4H4R12
• A16EW4H4R12 (Legacy)
• AMTEM4H4R18
• A16EW4H4R18 (Legacy)
• A16EW4H4R24

Indoor Units (Cassette Type)

• A16EC4H4R12
• A16EC4H4R18
• A16EC4H4R24

Indoor Units (Ducted Type)

• A16EK4H4R12
• A16EK4H4R18
• A16EK4H4R24

Indoor Units (Floor & Ceiling Type)

• A16EL4H4R09
• A16EL4H4R12
• A16EL4H4R18
• A16EL4H4R24

Outdoor Units

• AMTCM4H4R18
• AMTCM4H4R24
• AMTCM4H4R30
• AMTCM4H4R36
• AMTCM4H4R42

Possible Combinations

These are the recommended indoor-outdoor unit combinations.

Zones	Outdoor Unit	Indoor Units	Indoor Units	Indoor Units	Indoor Units	Indoor Units	Indoor Units	Indoor Units	Indoor Units
Dual Zone	AMTCM4H4R18	A16EW4H4R09	A16EW4H4R09	A16EW4H4R18
		A16EW4H4R09	A16EW4H4R12
Tri Zone	AMTCM4H4R24	A16EW4H4R09	A16EW4H4R09	A16EW4H4R12	A16EW4H4R09	A16EW4H4R18
		A16EW4H4R09	A16EW4H4R09	A16EW4H4R12	A16EW4H4R12
		A16EW4H4R09
Quad Zone	AMTCM4H4R30 AMTCM4H4R36	A16EW4H4R09	A16EW4H4R12	A16EW4H4R12	A16EW4H4R09	A16EW4H4R18
		A16EW4H4R09	A16EW4H4R12	A16EW4H4R12	A16EW4H4R09	A16EW4H4R18
		A16EW4H4R09	A16EW4H4R12	A16EW4H4R09	A16EW4H4R18
		A16EW4H4R09
Quint Zone	AMTCM4H4R42	A16EW4H4R09	A16EW4H4R12	A16EW4H4R09	A16EW4H4R09	A16EW4H4R09	A16EW4H4R12	A16EW4H4R18	A16EW4H4R09
		A16EW4H4R09	A16EW4H4R12	A16EW4H4R09	A16EW4H4R09	A16EW4H4R09	A16EW4H4R12	A16EW4H4R18	A16EW4H4R12
		A16EW4H4R09	A16EW4H4R12	A16EW4H4R12	A16EW4H4R12	A16EW4H4R09	A16EW4H4R12	A16EW4H4R12	A16EW4H4R18
		A16EW4H4R09	A16EW4H4R12	A16EW4H4R18	A16EW4H4R12	A16EW4H4R12	A16EW4H4R09
		A16EW4H4R09

• Note: Each indoor unit combination is viewed as a column.
• Note: Both quad zone outdoor units are capable of the same combinations but make your judgement on the correct one to use based on room size.
• Note: There are more possible combinations than those listed above. Please use proper capacity judgment when making multi-split combinations.

Error Codes

Error Code	Error Description
U8	Zero Cross Detection Circuit Malfunction (Indoor Unit)
C5	Malfunction Protection of Jumper Cap (Indoor Unit)
H6	Indoor Unit Motor Feedback (Indoor Unit)
F1	Indoor Ambient Temperature Sensor is Open/Short Circuited
F2	Indoor Evaporator Temperature Sensor is Open/Short Circuited
B5	Liquid Valve Temperature Sensor is Open/Short Circuited
B7	Gas Valve Temperature Sensor is Open/Short Circuited
P7	Modular Temperature Sensor is Open/Short Circuited
F3	Outdoor Ambient Temperature Sensor is Open/Short Circuited
F4	Outdoor Condenser Middle Pipe Temperature Sensor is Open/Short Circuited
F5	Outdoor Discharge Temperature Sensor is Open/Short Circuited
E6	Communication Malfunction
U1	Phase Current Detection Circuit Malfunction
P8	Module High Temperature Protection
F0	Insufficient Refrigeration System Protection
PU	Capacitor Charging Malfunction
E1	High Pressure System Protection
E3	Lower Pressure System Protection
H3	Compressor Overload Protection
LP	Indoor Units and Outdoor Units Are Incompatible
EE	Memory Chip Malfunction
DN	Wrong Connection of Communication Wire or Electronic Expansion Valve Malfunction
L3	Malfunction Protection of Outdoor Fan 1
DD	Wrong Connection of Communication Wire or Electronic Expansion Valve Malfunction Status Detected
E7	Mode Conflict
FO	Refrigerant Recycling Mode
AL	Cross Fan
H1	Defrosting or Oil Return in Heating Mode
LC	Compressor Failed to Start
E4	Compressor High Discharge Temperature Protection
E8	Overload Protection
E5	Whole Unit Overcurrent Protection
P5	Compressor Phase Current Protection
H7	Compressor Desynchronizing
LD	Compressor Phase-lacking/Phase-inverse Protection
H5	IPM Modular Protection
PL	Direct Current Bus-Bar Low Voltage Protection
PH	Direct Current Bus-Bar High Voltage Protection
HC	PFC Protection
U7	4-Way Valve Abnormal

• Note: To change from Celsius to Fahrenheit, power down remote, hold mode and down for 5 seconds.

AHRI Certification Information

Model Number	AHRI Number	Certification Type
A16CM4H4R18	6970608	Non-Ducted Indoor Units
A16CM4H4R24	6970623	Non-Ducted Indoor Units
A16CM4H4R36	6970636	Non-Ducted Indoor Units
A16CM4H4R39	6332649	Non-Ducted Indoor Units
A16CM4H4R42	7180449	Non-Ducted Indoor Units
AMTCM4H4R18	10149864	Non-Ducted Indoor Units
AMTCM4H4R24	10149867	Non-Ducted Indoor Units
AMTCM4H4R30	10149870	Non-Ducted Indoor Units
AMTCM4H4R36	10149873	Non-Ducted Indoor Units
AMTCM4H4R42	10149876	Non-Ducted Indoor Units
AMTCM4H4R18	10149865	Ducted Indoor Units
AMTCM4H4R24	10149868	Ducted Indoor Units
AMTCM4H4R30	10149871	Ducted Indoor Units
AMTCM4H4R36	10149874	Ducted Indoor Units
AMTCM4H4R18	10149866	Mixed Ducted and Non-Ducted Indoor Units
AMTCM4H4R24	10149869	Mixed Ducted and Non-Ducted Indoor Units
AMTCM4H4R30	10149872	Mixed Ducted and Non-Ducted Indoor Units
AMTCM4H4R36	10149875	Mixed Ducted and Non-Ducted Indoor Units
AMTCM4H4R42	10149878	Mixed Ducted and Non-Ducted Indoor Units

For the AHRI documentation please visit the AHRI Directory website.

Document Downloads

• Outdoor Unit User Manual (18K)
• Outdoor Unit User Manual (24, 30, 36K)
• Outdoor Unit User Manual (42K)
• Indoor Unit (Wall Mount) User Manual
• Outdoor Unit Service Manual (18, 24K)
• Outdoor Unit Service Manual (30, 36, 42K)
• Indoor Unit (Wall Mount) Service Manual
• Multi Split Submittal Sheet

Warranty Information

Each Multi Split unit set has a warranty of 5 years for parts and 7 years for the compressor. If you need more information, please visit the Air-Con Warranty Policy page.