Gree MULTI18HP230V1CO, MULTI24HP230V1CO, MULTI30HP230V1CO, MULTI36HP230V1CO, MULTI42HP230V1CO Installation Manual
Models:
MULTI18HP230V1CO
MULTI24HP230V1CO
MULTI30HP230V1CO
MULTI36HP230V1CO
MULTI42HP230V1CO
DUCTLESS INVERTER HEAT PUMP
INSTALLATION MANUAL
LIMITED WARRANTY STATEMENT
FOR WARRANTY SERVICE OR REPAIR:
Contact your installing contractor. You may find the installer’s name on the equipment or in your Owner’s packet. Complete product registration below and send
back by email to Service@twclimate.com.
GREE distributor (hereinafter “Company”) warrants this product against failure due to defect in materials or workmanship under normal use and maintenance as
follows. All warranty periods begin on the date of original installation. If the date cannot be verified, the warranty period begins one hundred twenty (120) days from
date of manufacture. If a part fails due to defect during the applicable warranty period, Company will provide a new or remanufactured part, at Company’s option,
to replace the failed defective part at no charge for the part. This limited warranty is subject to all provisions, conditions, limitations and exclusions listed below.
• A warranty period of Five (5) years on all parts to the original registered end user.
• A warranty period of One (1) year on the remote control provided with the original unit.
• Limited warranty applies only to systems that are properly installed by a state certified or licensed HVAC contractor, under applicable local and state law in
accordance with all applicable building codes and permits; GREE installation and operation instructions and good trade practices.
• Warranty applies only to products remaining in their original installation location.
• Defective parts must be returned to the distributor through a registered servicing dealer for credit.
LIMITATIONS OF WARRANTIES:
ALL IMPLIED WARRANTIES AND/OR CONDITIONS (INCLUDING IMPLIED WARRANTIES OR CONDITIONS OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR USE OR PURPOSE) ARE LIMITED TO THE DURATION OF THIS LIMITED WARRANTY, SOME STATES OR PROVINCES DO NOT ALLOW
LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY OR CONDITION LASTS, SO THE ABOVE MAY NOT APPLY TO YOU. THE EXPRESS WARRANTIES MADE IN THIS
WARRANTY ARE EXCLUSIVE AND MAY NOT BE ALTERED, ENLARGED, OR CHANGED BY ANY DISTRIBUTOR, DEALER, OR OTHER PERSON, WHATSOEVER.
When all qualifications for warranty have been met, a replacement unit will be provided when an indoor coil, outdoor coil, compressor, reversing valve or EEV is
confirmed faulty by a technical support representative from the originating distributor, within the first five (5) years of installation. The replacement unit will be
relative to the confirmed failed component, not a complete system.
THIS WARRANTY DOES NOT COVER:
1.
Labor or other costs incurred for diagnosing, repairing, removing, installing, shipping, servicing or handling of either defective parts, or replacement parts, or new units.
2. Product cleaning required prior to warranty service and repair.
3. Normal maintenance as outlined in the installation and servicing instructions or Owner’s Manual, including filter cleaning and/or replacement and lubrication.
4. Failure, damage or repairs due to faulty installation, misapplication, abuse, improper servicing, unauthorized alteration or improper operation.
5. Failure to start due to voltage conditions, blown fuses, open circuit breakers, or damages due to the inadequacy or interruption of electrical service.
6. Failure or damage due to floods, winds, fires, lightning, accidents, corrosive environments (rust, etc.) or other conditions beyond the control of the Company.
7. Failure or damage of coils or piping due to corrosion on installations within one (1) miles of sea coast or corrosive body.
8. Parts not supplied or designated by Company, or damages resulting from their use.
9. Products installed outside continental USA and Canada.
10. Electricity or fuel costs, or increases in electricity or fuel costs from any reason whatsoever, including additional or unusual use of supplemental electric heat.
11. Any cost to replace, refill or dispose of refrigerant, including the cost of refrigerant.
12. Shipping damage or damage as a result of transporting the unit.
13. Accessories such as condensate pumps, line sets and so forth are not covered.
14. Any special, indirect or consequential property or commercial damage of any nature whatsoever. Some states or provinces do not allow the exclusion of incidental
or consequential damages, so the above limitation may not apply to you.
This warranty gives you specific legal rights, and you may also have other rights which vary from state to state or province to province.
WSO021513-DLSWARR-HP
Gree Electric Appliances, Inc ©2017
Cat No:
GREE_MULTI21+_C_ INSTALLATION
_102617
PRODUCT REGISTRATION
Model No.
Serial No. Date of Installation
Owner Name
Address of Installation
Installing Contractor
Address
Phone No. / E-mail
TWD-1518 multi21+ install_printer.qxp_Layout 1 3/22/17 9:41 AM Page 1
Outdoor
Model Size
2-Zone 3-Zone 4-Zone 5-Zone
APPENDIX A
Authorized Indoor Unit Combinations
41
9+9
9+12
9+9
9+12
9+18
12+12
12+18
18+18
9+9
9+12
9+18
9+24
12+12
12+18
12+24
18+18
18+24
9+9
9+12
9+18
9+24
12+12
12+18
12+24
18+18
18+24
24+24
9+9
9+12
9+18
9+24
12+12
12+18
12+24
18+18
18+24
24+24
9+9+9
9+9+12
9+9+18
9+12+12
12+12+12
9+9+9
9+9+12
9+9+18
9+9+24
9+12+12
9+12+18
12+12+12
12+12+18
9+9+9
9+9+12
9+9+18
9+9+24
9+12+12
9+12+18
9+12+24
9+18+18
12+12+12
12+12+18
12+12+24
12+18+18
9+9+9
9+9+12
9+9+18
9+9+24
9+12+12
9+12+18
9+12+24
9+18+18
12+12+12
12+12+18
12+12+24
12+18+18
9+9+9+9
9+9+9+12
9+9+12+12
9+9+9+9
9+9+9+12
9+9+9+18
9+9+12+12
9+9+12+18
9+12+12+12
12+12+12+12
9+9+9+9
9+9+9+12
9+9+9+18
9+9+12+12
9+9+12+18
9+12+12+12
9+12+12+18
12+12+12+12
9+9+9+9+9
9+9+9+9+12
9+9+9+9+9
9+9+9+9+12
18
24
30
36
42
TWD-1518 multi21+ install_printer.qxp_Layout 1 3/22/17 9:41 AM Page 3
Table of Contents
Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
System Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Suggested Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installation Site Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
Crown Indoor Unit Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Terra Indoor Unit Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 -10
Vireo Indoor Unit Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-12
Indoor Unit Installation – Piping Design and Layout . . . . . . . . . . . . . . . . . 13 -15
Outdoor Unit Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 -18
Indoor Unit Installation – Mounting Bracket and Refrigerant Piping . . . . . 19- 20
Piping Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21- 26
Power and Wiring Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27- 31
Testing and Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 -33
Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35-36
Diagnostic Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37- 40
Appendix A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Back
Thank you for choosing a Multi21
Ductless Heat Pump for your customer.
Please read this installation manual carefully before installing and starting up the
Multi21 System. Take a moment to fill out the product and installation form on the
back cover. Retain both the manual and installation record for future reference.
Notes: 1) During defrosting process, the heating indicator is on for 10s and off for 0.5s.
2) Refer to Service Manual for additional information.
I
ndoor Unit
Display
Outdoor Unit Indicators
M
alfunction Name Possible Causes
DIAGNOSTIC CODES
Incompatible Indoor and
Outdoor Units
Defrosting Status
Compressor Phase Current
Protection
Module Temperature Sensor
Malfunction
Module Temperature Protection
High DC Bus Voltage Protection
Low DC Bus Voltage Protection
Capacitor Charging Malfunction
Compressor Phase-Current
Detection Malfunction
DC Bus Voltage Level Dropping
Malfunction
Current Detection Malfunction
Reversing Valve Malfunction
Input Current Detection Malfunction
The four-way valve is abnormal
Zero cross detection circuit
malfunction(for indoor unit)
Zero cross detection malfunction
Indoor and outdoor units are not compatible
1) IPM module malfunction
2) Outdoor control board malfunction
3) Compressor malfunction
Outdoor control board malfunction
1) Lack of thermal grease on IPM module
2) Heat sink (radiator) not tightly mounted
3) Control board malfunction
1) Supply voltage on L1 and N is above 265Vac
2) Capacitor on control board malfunction
3) Outdoor control board malfunction
1) Supply voltage on L1 and N is below 150Vac
2) Capacitor on control board malfunction
3) Outdoor control board malfunction
Capacitor malfunction
Outdoor control board malfunction
Unstable supply voltage
Outdoor control board malfunction
1) Voltage to reversing valve is less than 175V
2) Loose connections between reversing valve and control board
3) Reversing valve solenoid malfunction
Outdoor control board malfunction
Hardware malfunction
Hardware malfunction
Outdoor control board malfunction
LP
note 1
P5
P7
P8
PH
PL
PU
U1
U2
U3
U4
U5
U7
U8
U9
Yellow
16 flashes
and 1 sec Off
16 flashes
a
nd 1 sec Off
13 flashes
and 1 sec Off
12 flashes
and 1 sec Off
Red
40
TWD-1518 multi21+ install_printer.qxp_Layout 1 3/22/17 9:41 AM Page 5
SAFETY PRECAUTIONS
Please read the following before installation.
This is the safety alert symbol. It is used to alert you to potential
personal injury hazards. Obey all safety messages that follow this
symbol to avoid possible injury or death.
This mark indicates procedures which, if improperly performed,
might lead to the death or serious injury of the user.
This mark indicates procedures which, if improperly performed, might
possibly result in personal harm to the user, or damage to property.
Notice is used to address practices not related to personal injury.
General Safety Precautions
1. Instructions for installation and use of this product are provided by the manufacturer.
For proper operation, the system must be installed in accordance with this
installation manual.
2. Installation must be performed in accordance with local laws, regulations and
National Electrical Codes (NEC).
3. If refrigerant leaks while work is being carried out, ventilate the area. Do not allow
refrigerant to come in contact with a flame as it produces toxic gas.
4. Disconnect all electrical power to the indoor and outdoor units until the system is
ready for start-up and checkout.
5. When installing or repairing the system, use only R410A refrigerant. Do not
mix refrigerant with other gases. If air or other gas enter the refrigeration system,
the pressure inside the system may rise to an abnormally high value and cause
damage or injury.
This appliance is not intended for use by persons (including children) with reduced physical,
sensory or mental capabilities, or lack of experience and knowledge, unless they have been given
supervision or instruction concerning use of the appliance by a person responsible for their safety.
WARNING
CAUTION
NOTICE
WARNING
2 39
Indoor Unit
D
isplay
O
utdoor Unit Indicators
M
alfunction Name Possible Causes
DIAGNOSTIC CODES
Indoor Coil Freeze Protection Frequency Decrease/Limit Mode
P
ump Down or Gathering
Refrigerant Status
High Indoor Coil Temperature
in Heating- Frequency
Decrease/Limit Mode
Defrost Mode in Heating
Compressor Overload Protection
Compressor Overload Protection
IPM Module Protection
Indoor DC Fan Motor
Malfunction
Compressor De-Synchronized
Malfunction
Power Factor Correction (PFC)
Protection
Compressor Demagnetization
Protection
Outdoor Fan Motor
Malfunction
High Input Power Protection
Start-Up Malfunction
Compressor phase-lacking/
phase-inverse protection
1) Indoor coil has not reach minimum heating temperature
2) Indoor ambient is abnormally cold
3) Indoor control board malfunction
O
ptional Service Mode
1) Incorrect refrigerant charge
2) Metering device malfunction
3) Compressor malfunction
Operation status
1) Wiring terminal OVC-COMP is loose
2) Refer to the malfunction analysis in Service Manual
1) Incorrect refrigerant charge
2) Metering device malfunction
3) Compressor malfunction
1) IPM module over heating
2) Improper or Low voltage at the IPM module
3) IPM module malfunction
1) Loose connections between fan motor and control board
2) Fan motor or blower wheel bearings malfunction
3) Control board malfunction
1) Compressor voltage is not balance
2) Control board malfunction
3) Compressor malfunction
1) Mis-wiring of the reactor filter and PFC capacitor
2) Reactor filter or PFC capacitor malfunction
3) Control board malfunction
Compressor malfunction
1) Loose connections between fan motor and control board
2) Fan motor malfunction
3) Control board malfunction
1) Compressor malfunction
2) Power circuit malfunction
1) Over charged with refrigerant
2) Control board malfunction
3) Compressor malefaction
Hardware malfunction
FH
F
o
H0
H1
H3
H4
H5
H6
H7
HC
HE
L3
L9
LC
Ld
Yellow
1
7 flashes
and 1 sec Off
8 flashes
and 1 sec Off
6 flashes and
1 sec Off
4 flashes
and 1 sec Off
14 flashes
and 1 sec Off
9 flashes
and 1 sec Off
Red
4 flashes
and 1 sec Off
14 flashes
and 1 sec Off
TWD-1518 multi21+ install_printer.qxp_Layout 1 3/22/17 9:41 AM Page 7
Outdoor Unit
NOMENCLATURE
338
Indoor Unit
D
isplay
O
utdoor Unit Indicators
M
alfunction Name Possible Causes
DIAGNOSTIC CODES
High Temperature
Resistant Protection
Cold Air Protection
EEPROM Memory Malfunction
Module Phase Current Protection Frequency Decrease/Limit Mode
Module Temperature Protection Frequency Decrease/Limit Mode
Refrigerant Leakage Protection
Indoor Ambient Temperature
Sensor Malfunction
Indoor Coil Temperature
Sensor Malfunction
Outdoor Ambient Temperature
Sensor Malfunction
Outdoor Coil Temperature
Sensor Malfunction
Outdoor Discharge Temperature
Sensor Malfunction
Compressor Overload Protection Frequency Decrease/Limit Mode
Oil Return Protection - Frequency
Decrease/Limit Mode
System Current Overload Protection Frequency Decrease/Limit Mode
High Compressor Discharge
Temperature - Frequency
Decrease/Limit Mode
1) Incorrect refrigerant charge level
2) Refrigerant metering device malfunction
3
) Compressor malfunction
1) Indoor coil has not reach minimum heating temperature
2) Indoor ambient is abnormally cold
3) Indoor control board malfunction
Control board malfunction
Outdoor control board malfunction
1) IPM module over heating or malfunctioning
2) Improper voltage at IPM Module
1) refrigerant leak(s)
2) Indoor coil temperature sensor no calibrated
3) Refrigerant flow is restricted ( ex. valve, exv, debris)
1) Loose or bad connection between sensor and control board
2) Indoor ambient temperature sensor damaged
3) Control board malfunction
1) Loose or bad connection between sensor and control board
2) Indoor coil temperature sensor damaged
3) Control board malfunction
1) Loose or bad connection between sensor and control board
2) Outdoor ambient temperature sensor damaged
3) Control board malfunction
1) Loose or bad connection between sensor and control board
2) Outdoor coil temperature sensor damaged
3) Control board malfunction
1) Loose or bad connection between sensor and control board
2) Discharge temperature sensor damaged
3) Control board malfunction
1) Incorrect refrigerant charge
2) Metering device malfunction
3) Compressor malfunction
Normal function status code only
1) Input voltage too low
2) System pressure too low
1) Cooling load is too great
2) Outdoor ambient temperature too high
3) Refrigerant charge too low
4) Metering device malfunction
E8
E9
EE
En
EU
F0
F1
F2
F3
F4
F5
F6
F7
F8
F9
Yellow
6 flashes
and 1 sec Off
11 flashes
and 1 sec Off
Red
11 flashes
and 1 sec Off
9 flashes
and 1 sec Off
6 flashes
and 1 sec Off
5 flashes
and 1 sec Off
7 flashes
and 1 sec Off
3 flashes
and 1 sec Off
1 flashes
and 1 sec Off
2 flashes and
1 sec Off
TWD-1518 multi21+ install_printer.qxp_Layout 1 3/22/17 9:41 AM Page 9
SYSTEM REQUIREMENTS
REFRIGERANT CHARGE
ELECTRICAL REQUIREMENTS
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.
Unit Size (BtuH)
L
iquid Line
i
n(mm)
S
uction/Gas Line
i
n(mm)
18,000
Port A 1/4 (6) 3/8 (9.5)
Port B 1/4 (6) 3/8 (9.5)
P
ort A 1/4 (6) 3/8 (9.5)
24,000 Port B 1/4 (6) 3/8 (9.5)
P
ort C 1/4 (6) 3/8 (9.5)
P
ort A 1/4 (6) 3/8 (9.5)
3
0,000
Port B 1/4 (6) 3/8 (9.5)
P
ort C 1/4 (6) 3/8 (9.5)
Port D 1/4 (6) 3/8 (9.5)
Port A 1/4 (6) 3/8 (9.5)
36,000
Port B 1/4 (6) 3/8 (9.5)
Port C 1/4 (6) 3/8 (9.5)
Port D 1/4 (6) 3/8 (9.5)
Port E 1/4 (6) 3/8 (9.5)
Port A 1/4 (6) 3/8 (9.5)
Port B 1/4 (6) 3/8 (9.5)
42,000 Port C 1/4 (6) 3/8 (9.5)
Port D 1/4 (6) 3/8 (9.5)
Port E 1/4 (6) 3/8 (9.5)
Unit Size Max Total Pipe
Min
Equivalent Max Equivalent Max Elev btwn Max Elev btwn
(BtuH) Length ft(m) Pipe Length ft(m) PipeLength ft(m) IND Units ft(m) IND& OTDUnits ft(m)
18,000 65 (20) 10 (3) 33 (10) 33 (10) 33 (10)
24,000 197 (60) 10 (3) 65 (20) 33 (10) 33 (10)
30,000 230 (70) 10 (3) 82 (25) 33 (10) 49 (15)
36,000 246 (75) 10 (3) 82 (25) 33 (10) 49 (15)
42,000 246 (75) 10 (3) 82 (25) 33 (10) 49 (15)
Unit Size
Voltage
Min Circuit Max Overcurrent Main Power
(BtuH) Amps (MCA) Protection (MOP) Wire Size (AWG)**
18,000 208/230v - 1ph 60hz 16 25 12
24,000 208/230v - 1ph 60hz 23 30 10
30,000 208/230v - 1ph 60hz 20 30 10
36,000 208/230v - 1ph 60hz 23 35 8
42,000 208/230v - 1ph 60hz 24 40 8
**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.
REFRIGERANT PIPE LENGTHS
Unit Size Refrigerant Factory System Max Pipe Length w/out Additional
(BtuH) Type Charge oz(kg) adding Refrig ft(m) Charge oz/ft (g/m)
18,000 R-410A 56.5 (1.6) 33 (10) 0.2 (20)
24,000 R-410A 77.6 (2.2) 98 (30) 0.2 (20)
30,000 R-410A 98.7 (2.8) 131 (40) 0.2 (20)
36,000 R-410A 128.8 (3.65) 131 (40) 0.2 (20)
42,000 R-410A 128.8 (3.65) 131 (40) 0.2 (20)
4 37
DIAGNOSTIC CODES
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
Indoor Anti-Freeze Protection
Low Pressure Protection
Compressor High Discharge
Temperature Protection
Overcurrent Protection
Communication Malfunction
Mode conflict (Indoor units
calling for simutaneuously
Heating and Cooling)
Operation status
1) Loose or bad connection between sensor and control board
2) Indoor Evap Coil temperature sensor damaged
3) Control board malfunction
Hardware malfunction
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
Operation status
Hardware malfunction
1) Over charged with refrigerant
2) Blocked or dirty outdoor coil
3) Extreme outdoor ambient conditions
1) Low return airflow
2) Indoor fan speed is too low
3) Indoor coil is blocked or dirty
1) Low on refrigerant
2) Pressure sensor is damaged
Please refer to the malfunction analysis (discharge
temperature, overload) in service manual
1) Supply voltage is unstable
2) Supply voltage is too low and system load is too high
3) Indoor coil is blocked or dirty
1) Communication cable is mis-wired between indoor
and outdoor units
2) Indoor or Outdoor control board malfunction
Operation status
AL
b5
b7
C5
dd
dn
E1
E2
E3
E4
E5
E6
E7
Y
ellow
3 flashes
and 1 sec Off
7 flashes
and 1 sec Off
5 flashes
and 1 sec Off
Continuous
On
R
ed
9 flashes
and 1 sec Off
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:
I
ndoor Unit
& Remote
Display
O
utdoor Unit Indicators
Malfunction Name Possible Causes
TWD-1518 multi21+ install_printer.qxp_Layout 1 3/22/17 9:41 AM Page 11
• Standard Wrench
• Adjustable/Crescent Wrench
• Torque Wrench
• Hex Keys or Allen Wrenches
• Drill & Drill Bits
• Hole Saw
• Pipe Cutter
• Screw drivers (Phillips & Flat blade)
• Manifold and Gauges
• Level
• R410A Flaring Tool
• Clamp on Amp Meter
• Vacuum Pump
• Safety Glasses
• Work Gloves
• Refrigerant Scale
• Micron Gauge
SUGGESTED TOOLS
5
TROUBLESHOOTING
PROBLEM
Water leaking from the indoor
unit into the room.
Wireless remote controller
does not work.
The unit will not deliver air.
Moisture or condensation
on the discharge air louvers
or outlet vents.
Mode Conflict (E7) is displayed.
CAUSE/SOLUTION
Cause:
While it is normal for the system to generate condensate water in cooling
mode, it is designed to drain this water via a condensate drain system to a safe location.
Solution: If water is leaking into the room, it may indicate one of the following.
• The indoor unit is not level right to left. Level indoor unit.
• The condensate drain pipe is restricted or plugged. All restrictions must
be removed to allow continuous drainage by gravity.
• If problem persists, contact a qualified service professional for assistance.
Cause: There are a number of possible reasons.
Solution: Check the following:
• The remote controller was not matched to the indoor unit.
See matching instructions.
• The batteries might be low. Change the batteries.
• The remote controller must be within 25 ft. (7.5 m) with no obstructions
of the indoor unit. If remote controller needs to be replaced, contact a
qualified service professional for assistance. In the meantime, use the
Aux button to operate the system.
Cause: There are a number of system functions that will prevent air flow.
Solution: Check for the following:
• In heating mode, the indoor fan may not start for three minutes if the
room temperature is very low. This is to prevent blowing cold air.
• In heat mode, if the outdoor temperature is low and humidity is high,
the system may need to defrost for up to 10 minutes before beginning
a heating cycle.
• In dry mode, the indoor fan may stop for up to three minutes during the
compressor off delay.
• Otherwise, you should contact a qualified service professional for assistance.
Cause: It is normal for the system to develop condensation or moisture on the
discharge air louvers when cooling warm humid air for a long period of time.
Solution: The condensation or moisture will disappear as the system cools and
dehumidifies the room space.
Cause: When indoor units have different mode settings (for example, some set
to Cool, others set to Heat, Fan Only or Dry) it creates a Mode Conflict.
Solution: Be sure that all indoor units are set to the same mode (i.e., Cool, Heat,
Fan Only or Dry). Once this is done, the Mode Conflict status will disappear.
36
TWD-1518 multi21+ install_printer.qxp_Layout 1 3/22/17 9:41 AM Page 13
Loading...