Gree MULTI18HP230V1CO Installation Manual page 3

TWD-1518 multi21+ install_printer.qxp_Layout 1 3/22/17 9:41 AM Page 5
DIAGNOSTIC CODES
Outdoor Unit Indicators
Indoor Unit
Malfunction Name
Display
Incompatible Indoor and LP 16 flashes
Outdoor Units and 1 sec Off
Defrosting Status note 1 16 flashes
and 1 sec Off
Compressor Phase Current P5
Protection
Module Temperature Sensor P7
Malfunction
Module Temperature Protection P8
High DC Bus Voltage Protection PH 13 flashes
and 1 sec Off
Low DC Bus Voltage Protection PL 12 flashes
and 1 sec Off
Capacitor Charging Malfunction PU
Compressor Phase-Current U1
Detection Malfunction
DC Bus Voltage Level Dropping U2
Malfunction
Current Detection Malfunction U3
Reversing Valve Malfunction U4
Input Current Detection Malfunction U5
The four-way valve is abnormal U7
Zero cross detection circuit U8
malfunction(for indoor unit)
Zero cross detection malfunction U9
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.
Possible Causes
Yellow Red
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
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.
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
40