System Requirements - Gree MULTI18HP230V1CO Installation Manual

TWD-1518 multi21+ install_printer.qxp_Layout 1 3/22/17 9:41 AM Page 11

SYSTEM REQUIREMENTS

Unit Size (BtuH)
Port A
18,000
Port B
Port A
24,000 Port B
Port C
Port A
Port B
30,000
Port C
Port D
Port A
Port B
36,000
Port C
Port D
Port E
Port A
Port B
42,000 Port C
Port D
Port E
REFRIGERANT PIPE LENGTHS
Unit Size Max Total Pipe Min Equivalent
(BtuH) Length ft(m) Pipe Length ft(m)
18,000 65 (20) 10 (3)
24,000 197 (60) 10 (3)
30,000 230 (70) 10 (3)
36,000 246 (75) 10 (3)
42,000 246 (75) 10 (3)
REFRIGERANT CHARGE
Unit Size Refrigerant
(BtuH) Type
18,000 R-410A
24,000 R-410A
30,000 R-410A
36,000 R-410A
42,000 R-410A
ELECTRICAL REQUIREMENTS
Unit Size
Voltage
(BtuH)
18,000 208/230v - 1ph 60hz
24,000 208/230v - 1ph 60hz
30,000 208/230v - 1ph 60hz
36,000 208/230v - 1ph 60hz
42,000 208/230v - 1ph 60hz
**Main power wire from electrical panel to outdoor unit. AWG based on 240VAC Single Phase, 100 ft. distance 1-way, max. 5% allowable voltage drop.
Notes: 1) System must be on a single dedicated circuit.
2) Main power is supplied to the outdoor unit.
3) Use table above to size over current protection.
4) Follow all local building codes and NEC (National Electrical Code) regulations.
Interconnecting Cable: Recommended cable - 14/4 AWG stranded bare copper conductors THHN 600V unshielded wire
Note: Use shield cable if installation is in close proximity of RF and EMI transmitting devices.
Liquid Line in (mm) Suction/Gas Line in (mm)
1/4 (6) 3/8 (9.5)
1/4 (6) 3/8 (9.5)
1/4 (6) 3/8 (9.5)
1/4 (6) 3/8 (9.5)
1/4 (6) 3/8 (9.5)
1/4 (6) 3/8 (9.5)
1/4 (6) 3/8 (9.5)
1/4 (6) 3/8 (9.5)
1/4 (6) 3/8 (9.5)
1/4 (6) 3/8 (9.5)
1/4 (6) 3/8 (9.5)
1/4 (6) 3/8 (9.5)
1/4 (6) 3/8 (9.5)
1/4 (6) 3/8 (9.5)
1/4 (6) 3/8 (9.5)
1/4 (6) 3/8 (9.5)
1/4 (6) 3/8 (9.5)
1/4 (6) 3/8 (9.5)
1/4 (6) 3/8 (9.5)
Max Equivalent Max Elev btwn Max Elev btwn
Pipe Length ft(m) IND Units ft(m) IND&OTDUnits ft(m)
33 (10) 33 (10) 33 (10)
65 (20) 33 (10) 33 (10)
82 (25) 33 (10) 49 (15)
82 (25) 33 (10) 49 (15)
82 (25) 33 (10) 49 (15)
Factory System Max Pipe Length w/out Additional
Charge oz(kg) adding Refrig ft(m) Charge oz/ft (g/m)
56.5 (1.6) 33 (10)
77.6 (2.2) 98 (30)
98.7 (2.8) 131 (40)
128.8 (3.65) 131 (40)
128.8 (3.65) 131 (40)
Min Circuit Max Overcurrent Main Power
Amps (MCA) Protection (MOP) Wire Size (AWG)**
16 25
23 30
20 30
23 35
24 40
DIAGNOSTIC CODES
Troubleshooting
The unit has onboard diagnostics. The outdoor unit will provide status indicators. The indoor
wall unit and remote controller will display error codes. The following is a summary of the
codes with explanation:
Malfunction Name
X-fan Mode
Indoor Evap Coil Temperature
Sensor Malfunction
Gas valve temperature sensor
is open/short circuited
System Configuration
Malfunction
Communication wire error or
electronic expansion valve
malfunction
Wrong connection of communication
wire or malfunction of electronic
expansion valve
System High Pressure
0.2 (20)
Indoor Anti-Freeze Protection
0.2 (20)
0.2 (20)
0.2 (20)
0.2 (20)
Low Pressure Protection
Compressor High Discharge
Temperature Protection
12
Overcurrent Protection
10
10
8
8
Communication Malfunction
Mode conflict (Indoor units
calling for simutaneuously
Heating and Cooling)
4
Indoor Unit
Outdoor Unit Indicators
Possible Causes
& Remote
Yellow Red
Display
AL Operation status
b5 1) Loose or bad connection between sensor and control board
2) Indoor Evap Coil temperature sensor damaged
3) Control board malfunction
b7 Hardware malfunction
C5 1) No jumper cap inserted on the control board
2) Incorrect or damaged jumper cap on control board
3) Indoor and outdoor units are not compatible
dd Operation status
dn Hardware malfunction
E1
1) Over charged with refrigerant
2) Blocked or dirty outdoor coil
3) Extreme outdoor ambient conditions
E2 3 flashes 1) Low return airflow
and 1 sec Off 2) Indoor fan speed is too low
3) Indoor coil is blocked or dirty
E3 9 flashes 1) Low on refrigerant
and 1 sec Off 2) Pressure sensor is damaged
E4 7 flashes Please refer to the malfunction analysis (discharge
and 1 sec Off temperature, overload) in service manual
E5 5 flashes 1) Supply voltage is unstable
and 1 sec Off 2) Supply voltage is too low and system load is too high
3) Indoor coil is blocked or dirty
E6 Continuous 1) Communication cable is mis-wired between indoor
On and outdoor units
2) Indoor or Outdoor control board malfunction
E7 Operation status
37