A16CM4H4R18
From Technical Support Wiki
A16CM4H4R18 is the 16 SEER, 18,000 Btu dual zone multi split unit.
Wiring Diagram
Exploded View and Parts List
| Number | Part Name |
|---|---|
| 1 | Front Grill |
| 2 | Cabinet |
| 3 | Chassis Sub-Assy |
| 4 | Drainage Joint |
| 5 | Compressor Gasket |
| 6 | Compressor and Fittings |
| 7 | Magnet Coil |
| 8 | 4-Way Valve Assy |
| 9 | Temperature Sensor |
| 10 | Temperature Sensor |
| 11 | Cut-Off Valve |
| 12 | Cut-Off Valve |
| 13 | Block |
| 14 | Handle Assy |
| 15 | Electric Expand Valve Fitting |
| 16 | Electric Expand Valve Fitting |
| 17 | PFC Inductance |
| 18 | Clapboard Sub-Assy |
| 19 | Temperature Sensor |
| 20 | Rear Grill |
| 21 | Condenser Assy |
| 22 | Top Cover |
| 23 | Motor Support Sub-Assy |
| 24 | Left Side Plate |
| 25 | Electric Box Assy |
| 26 | Fan Motor |
| 27 | Axial Flow Fan |
Piping Sizes
| Liquid Side | Gas Side | Evaporators |
|---|---|---|
| 1/4" | 3/8" | A16EM4H4R09 A16EM4H4R12 |
| 1/4" | 1/2" | A16EM4H4R18 |
Malfunction Indicator
Note: When several malfunctions occur at the same time, they will be displayed in circulation and every malfunction is displayed for 5 seconds.
| NO. | Malfunction description | LED1 | LED2 | LED3 | LED4 |
| 0 | Normal stop | off | off | off | off |
| 1 | Compressor run | on | off | off | off |
| 2 | Compressor overload protection | blinking | off | off | off |
| 3 | Discharge protection | off | on | off | off |
| 4 | Outdoor unit overload protection | on | on | off | off |
| 5 | High pressure protection | blinking | on | off | off |
| 6 | Over current protection | off | blinking | off | off |
| 7 | IMP protection | on | blinking | off | off |
| 8 | IMP overheating protection | blinking | blinking | off | off |
| 9 | PFC protection (including PFC overheating protection) | off | off | on | off |
| 10 | Phase current protection | on | off | on | off |
| 11 | Over voltage protection | blinking | off | on | off |
| 12 | Insufficient voltage protection | off | on | on | off |
| 13 | Start failure | on | on | on | off |
| 14 | Compressor desynchronizing | blinking | on | on | off |
| 15 | Compressor phase-lacking protection | off | blinking | on | off |
| 16 | Compressor phase current detection malfunction | on | blinking | on | off |
| 17 | Memory chip mistake | blinking | blinking | on | off |
| 18 | DC power supply short-circuit | off | off | blinking | off |
| 19 | Defrosting | on | off | blinking | off |
| 20 | Oil return | blinking | off | blinking | off |
| 21 | Complete unit frequency restriction protection | off | on | blinking | off |
| 22 | Complete unit frequency dropping protection | on | on | blinking | off |
| 23 | Unit A frequency restriction or frequency dropping protection | blinking | on | blinking | off |
| 24 | Unit B frequency restriction or frequency dropping protection | off | blinking | blinking | off |
| 25 | Unit C frequency restriction or frequency dropping protection | on | blinking | blinking | off |
| 26 | Unit D frequency restriction or frequency dropping protection | blinking | blinking | blinking | off |
| 27 | Outdoor ambient temperature sensor protection | off | off | off | on |
| 28 | Outdoor tube temperature sensor protection | on | off | off | on |
| 29 | Discharge temperature sensor protection | blinking | off | off | on |
| 30 | IPM thermal resistance malfunction | off | on | off | on |
| 31 | Unit A liquid pipe temperature sensor malfunction | on | on | off | on |
| 32 | Unit A gas pipe temperature sensor malfunction | blinking | on | off | on |
| 33 | Unit B liquid pipe temperature sensor malfunction | off | blinking | off | on |
| 34 | Unit B gas pipe temperature sensor malfunction | on | blinking | off | on |
| 35 | Unit C liquid pipe temperature sensor malfunction | blinking | blinking | off | on |
| 36 | Unit C gas pipe temperature sensor malfunction | off | off | on | on |
| 37 | Unit D liquid pipe temperature sensor malfunction | on | off | on | on |
| 38 | Unit D gas pipe temperature sensor malfunction | blinking | off | on | on |
| 39 | Unit A mode conflict | off | on | on | on |
| 40 | Unit B mode conflict | on | on | on | on |
| 41 | Unit C mode conflict | blinking | on | on | on |
| 42 | Unit D mode conflict | off | blinking | on | on |
| 43 | Communication failure with Unit A | on | blinking | on | on |
| 44 | Communication failure with Unit B | blinking | blinking | on | on |
| 45 | Communication failure with Unit C | off | off | blinking | on |
| 46 | Communication failure with Unit D | on | off | blinking | on |
| 47 | Unit A freeze protection | blinking | off | blinking | on |
| 48 | Unit B freeze protection | off | on | blinking | on |
| 49 | Unit C freeze protection | on | on | blinking | on |
| 50 | Unit D freeze protection | blinking | on | blinking | on |
| 51 | Unit A overheating prevention protection | off | blinking | blinking | on |
| 52 | Unit B overheating prevention protection | on | blinking | blinking | on |
| 53 | Unit C overheating prevention protection | blinking | blinking | blinking | on |
| 54 | Unit D overheating prevention protection | off | off | off | blinking |
| 55 | Unit A communication wire misconnection or expansion valve malfunction | on | off | off | blinking |
| 56 | Unit B communication wire misconnection or expansion valve malfunction | blinking | off | off | blinking |
| 57 | Unit C communication wire misconnection or expansion valve malfunction | off | on | off | blinking |
| 58 | Unit D communication wire misconnection or expansion valve malfunction | on | on | off | blinking |
Common Troubleshooting
The following outline solutions for malfunctions that are either not indicated by the LEDs or cover more than one malfunction number in the above table.
- Capacity Charging Malfunction
- Anti-High Temperature and Overload Malfunction
- Temperature Sensor Malfunction
- Start Failure Malfunction
- Communication Malfunction
- Compressor Overload/Discharge Protection Malfunction