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TWD-1518 multi21+ install_printer.qxp_Layout 1 3/22/17 9:41 AM Page 7
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,
W RNING
might lead to the death or serious injury of the user.
This mark indicates procedures which, if improperly performed, might
C UTION
possibly result in personal harm to the user, or damage to property.
Notice is used to address practices not related to personal injury.
NOTICE
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.
W RNING
DIAGNOSTIC CODES
Indoor Unit
Malfunction Name
Display
Indoor Coil Freeze Protection -
FH
Frequency Decrease/Limit Mode
Pump Down or Gathering
Fo
Refrigerant Status
High Indoor Coil Temperature
H0
in Heating- Frequency
Decrease/Limit Mode
Defrost Mode in Heating
H1
Compressor Overload Protection
H3
Compressor Overload Protection
H4
IPM Module Protection
H5
Indoor DC Fan Motor
H6
Malfunction
Compressor De-Synchronized
H7
Malfunction
Power Factor Correction (PFC)
HC
Protection
Compressor Demagnetization
HE
Protection
Outdoor Fan Motor
L3
Malfunction
High Input Power Protection
L9
Start-Up Malfunction
LC
Compressor phase-lacking/
Ld
phase-inverse protection
2
Outdoor Unit Indicators
Possible Causes
Yellow
Red
4 flashes
1) Indoor coil has not reach minimum heating temperature
and 1 sec Off
2) Indoor ambient is abnormally cold
3) Indoor control board malfunction
17 flashes
Optional Service Mode
and 1 sec Off
1) Incorrect refrigerant charge
2) Metering device malfunction
3) Compressor malfunction
Operation status
8 flashes
1) Wiring terminal OVC-COMP is loose
and 1 sec Off
2) Refer to the malfunction analysis in Service Manual
6 flashes and
1) Incorrect refrigerant charge
1 sec Off
2) Metering device malfunction
3) Compressor malfunction
4 flashes
1) IPM module over heating
and 1 sec Off
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
14 flashes
1) Mis-wiring of the reactor filter and PFC capacitor
and 1 sec Off
2) Reactor filter or PFC capacitor malfunction
3) Control board malfunction
Compressor malfunction
14 flashes
1) Loose connections between fan motor and control board
and 1 sec Off
2) Fan motor malfunction
3) Control board malfunction
9 flashes
1) Compressor malfunction
and 1 sec Off
2) Power circuit malfunction
1) Over charged with refrigerant
2) Control board malfunction
3) Compressor malefaction
Hardware malfunction
39
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