Use and Care Manual
Table Of Contents
- Foreword
- Safety Notice
- CONTENTS
- Safety Notice on Maintenance
- Safety Notice on Operation
- 1 Product Introduction
- NOTE: 1 Ton =12000Btu/h = 3.517kW 1.2 Electrical Parameters
- 2 Control
- 3 Troubleshooting
- 3.1 Wiring Diagrams
- 3.2 PCB Layout
- 3.3 Error Code
- 3.4 Troubleshooting
- 3.4.1 “E1” Compressor High Pressure Protection
- 3.4.2 “E3” Compressor Low-pressure Protection, Refrigerant Shortage Protection, Refrigerant Recovery Mode
- 3.4.3 “E4” Compressor Air Discharge High-temperature Protection
- 3.4.4 “F2” Condenser Temperature Sensor Error
- 3.4.5 “F3” Outdoor Ambient Temperature Sensor Error
- 3.4.6 “F4” Discharge Temperature Sensor Error
- 3.4.7 “F6” ODU Tube Temperature Sensor Error
- 3.4.8“EE” ODU Memory Chip Error
- 3.4.9 “H4” Overload
- 3.4.10 “H5” IPM Protection
- 3.4.11 “H6” DC Fan Error
- 3.4.12 “H7” Driver Out-of-Step Protection
- 3.4.13 “HC” PFC Protection
- 3.4.14 “Lc” Startup Failure
- 3.4.15 “P0” Driver Reset Protection
- 3.4.16 “P5” Over-Current Protection
- 3.4.17 “P6” Master Control and Driver Communication Error
- 3.4.18 “P7” Driver Module Sensor Error
- 3.4.19 “P8” Driver Module High Temperature Protection
- 3.4.20 “PA” AC Current Protection
- 3.4.21 “Pc” Driver Current Error
- 3.4.22 “PL” Bus Low-Voltage Protection
- 3.4.23 “PH” Bus High-Voltage Protection
- 3.4.24 “PU” Charge Loop Error
- 3.4.25 “ee” Drive Memory Chip Error
- 3.5 Failures Not Caused by Errors
- 4 Maintenance
- Appendices
- 1 Resistance/Temperature Lists of Temperature Sensors
- 1.1 Voltage List of 15 KΩ Temperature Sensors (including ODU temperature sensors)
- 1.2 Voltage List of 20 KΩ Pipeline Temperature Sensors (including temperature sensors for defroster, IDU and ODU pipes)
- 1.3 Voltage List of 50 KΩ Discharge Temperature Sensors (including discharge air temperature sensor)
- 2 Temperature/Pressure List of Refrigerant
- 3 Operation Tools
MRCOOL DC INVERTER COOLING ONLY CONDENSING UNIT
11
Capacity
48K indoor unit dip switches
60K indoor unit dip switches
Level 1
Level 2
(Default)
Level 6
Level 7
Level 8
2.3.4 Refrigerant Recovery Control
Press and hold "SW1" for about 5s to enter the first level menu of the debugging mode, the outdoor unit
mainboard LED displayer flashes. Under the first level menu, short press "SW1" to switch various functions. After
switching to "08", short press "SW2" or "SW3" to enter the refrigerant recovery control mode, "ON" means open,
"OF" means close. And then short press "SW1" to save. During debugging, if no operation is performed within
10s, the debugging mode interface will be exited.
2.3.5 Forced Operation Control
Press and hold "SW1" for about 5s to enter the first level menu of the debugging mode, the outdoor unit
mainboard LED displayer flashes. Under the first level menu, short press "SW1" to switch various functions. After
switching to "09", short press "SW2" or "SW3" to enter the forced operation control mode, "01" denotes that turn
on the forced operation cooling mode; "02" denotes that turn on the forced operation cooling mode; "OF"
indicates that shut down the forced cooling mode. And then short press "SW1" to save. During debugging, if no
operation is performed within 10s, the debugging mode interface will be exited.