Daikin RZQ Series FCQ20EVA User manual

Service
Manual
RZQ Series
Heat Pump R410A 60Hz
RZQ20 / 24 / 36 / 45LVA
RZQ45 / 48MYL
SiME281501E

SiME281501E
iTable of Contents
TopAir RZQ Series
Heat Pump
R410A 60Hz
ED Reference
For items below, please refer to Engineering Data.
1. Introduction ............................................................................................ iv
1.1 Safety Cautions ....................................................................................... iv
1.2 Used Icons ............................................................................................ viii
Part 1 General Information ........................................................... 1
1. Model Name of Indoor / Outdoor Units ...................................................2
2. External Appearance...............................................................................3
Part 2 Functions............................................................................ 4
1. Functions.................................................................................................5
Part 3 Remote Controller .............................................................. 6
1. Wired Remote Controller.........................................................................7
1.1 Applicable Models ....................................................................................7
1.2 Names and Functions ..............................................................................8
1.3 MAIN/SUB Setting when Using 2 Remote Controllers ...........................11
1.4 Centralized Control Group No. Setting...................................................12
2. Wireless Remote Controller ..................................................................13
2.1 Applicable Models ..................................................................................13
2.2 Names and Functions ............................................................................13
2.3 Address and MAIN/SUB Setting.............................................................15
3. Service Mode ........................................................................................17
3.1 BRC1C61/BRC1D61 ..............................................................................17
Part 4 Function and Control........................................................ 19
1. Functions of Main Components and Thermistors .................................20
2. Function Outline ....................................................................................23
2.1 Indoor Unit..............................................................................................23
3. Operation Flow Chart ............................................................................25
3.1 Cooling / Dry Operation..........................................................................25
3.2 Heating Operation ..................................................................................26
No. Item ED No. Page Remarks
1 Specification EDTW281313A P. 9-22
2 Option List EDTW281313A P. 70-72

SiME281501E
Table of Contents ii
4. Function Details ....................................................................................27
4.1 Indoor Unit..............................................................................................27
4.2 Outdoor Unit ...........................................................................................32
Part 5 Field Setting ..................................................................... 48
1. Test Operation ......................................................................................49
1.1 Check Items before the Test Operation .................................................49
1.2 Test Operation........................................................................................49
2. Field Setting from Remote Controller....................................................51
2.1 Wired Remote Controller........................................................................51
2.2 Wireless Remote Controller ...................................................................52
2.3 Setting Contents and Code No. for Indoor Units ....................................53
2.4 Setting Contents and Code No. for Outdoor Units .................................57
3. Field Setting from Outdoor Unit PCB ....................................................60
3.1 Location of DIP Switch and BS Button...................................................60
3.2 Field Setting for Outdoor Unit.................................................................61
4. Emergency Operation ...........................................................................67
4.1 Forced Operation ...................................................................................67
4.2 Emergency Operation when the Remote Controller is Lost ...................68
Part 6 Service Diagnosis............................................................. 69
1. Maintenance Inspection ........................................................................71
1.1 Overview ................................................................................................71
2. Symptom-based Troubleshooting .........................................................74
2.1 Overview ................................................................................................74
2.2 Equipment does not Operate .................................................................75
2.3 Indoor Unit Fan Operates, but Compressor does not Operate ..............76
2.4 Cooling / Heating Operation Starts but Stops Immediately ....................77
2.5 After Unit Shuts Down, It cannot be Restarted for a While ....................78
2.6 Equipment Operates but does not Provide Cooling ...............................80
2.7 Equipment Operates but does not Provide Heating ...............................81
2.8 Equipment Discharges White Mist .........................................................82
2.9 Equipment Produces Loud Noise or Vibration .......................................83
2.10 Equipment Discharges Dust...................................................................84
2.11 Remote Controller LCD Displays "88" ....................................................84
3. Troubleshooting by LED Indications .....................................................85
3.1 Troubleshooting by LED on the Indoor Unit ...........................................85
3.2 Troubleshooting by LED on Outdoor Unit PCB......................................85
4. Troubleshooting by Remote Controller .................................................86
4.1 Procedure of Self-diagnosis by Remote Controller ................................86
4.2 Error Codes and Description ..................................................................89
4.3 Safety Devices .......................................................................................90
4.4 Error of External Protection Device ........................................................91
4.5 Indoor Unit PCB Abnormality .................................................................92
4.6 Drain Water Level System Abnormality..................................................93
4.7 Indoor Unit Fan Motor Abnormality ........................................................95
4.8 Swing Flap Motor Abnormality / Lock.....................................................96
4.9 Abnormal Power Supply Voltage............................................................98
4.10 Drain System Abnormality......................................................................99
4.11 Capacity Setting Abnormality ...............................................................100

SiME281501E
iii Table of Contents
4.12 Transmission Error between Indoor Unit PCB and Fan PCB...............101
4.13 Thermistor Abnormality ........................................................................103
4.14 Combination Error between Indoor Unit PCB and Fan PCB ................104
4.15 Humidity Sensor System Abnormality ..................................................105
4.16 Room Temperature Thermistor in Remote Controller Abnormality ......106
4.17 Outdoor Unit PCB Abnormality.............................................................107
4.18 High Pressure Abnormality (Detected by the High Pressure Switch)...108
4.19 Low Pressure Abnormality ...................................................................110
4.20 Compressor Motor Lock .......................................................................112
4.21 Outdoor Unit Fan Motor Abnormality....................................................114
4.22 Electronic Expansion Valve Abnormality..............................................116
4.23 Discharge Pipe Temperature Control Error..........................................119
4.24 High Pressure Switch System Abnormality ..........................................121
4.25 Thermistor System Abnormality ...........................................................122
4.26 Pressure Sensor Abnormality...............................................................123
4.27 Outdoor Unit PCB Abnormality.............................................................124
4.28 Radiation Fin Temperature Rise ..........................................................126
4.29 DC Output Overcurrent ........................................................................128
4.30 Electronic Thermal (Time Lag) .............................................................130
4.31 Stall Prevention (Time Lag)..................................................................132
4.32 Transmission Error between Control and Inverter PCB .......................134
4.33 Transmission Error between Control and Inverter PCB .......................135
4.34 Open Phase or Power Supply Voltage Imbalance ...............................137
4.35 Radiation Fin Thermistor (R10T) or Related Abnormality ....................138
4.36 Defective Capacity Setting ...................................................................139
4.37 Refrigerant Shortage (Error).................................................................140
4.38 Refrigerant Shortage ............................................................................141
4.39 Power Supply Voltage Abnormality......................................................142
4.40 Transmission Error between Indoor Unit and Outdoor Unit .................143
4.41 Transmission Error between Indoor Unit and Remote Controller.........146
4.42 Transmission Error between MAIN Remote Controller
and SUB Remote Controller.................................................................147
4.43 Field Setting Switch Abnormality..........................................................148
4.44 Centralized Address Setting Error........................................................150
4.45 Transmission Error between Indoor and Outdoor Unit /
Piping and Wiring Mismatch / Refrigerant Shortage ............................151
4.46 Check ...................................................................................................152
Part 7 Appendix......................................................................... 166
1. Wiring Diagrams..................................................................................167
1.1 Indoor Units ..........................................................................................167
1.2 Outdoor Units .......................................................................................169

SiME281501E Introduction
iv
1. Introduction
1.1 Safety Cautions
Cautions and
Warnings
Be sure to read the following safety cautions before conducting repair work.
The caution items are classified into “ Warning” and “ Caution”. The “ Warning”
items are especially important since they can lead to death or serious injury if they are not
followed closely. The “ Caution” items can also lead to serious accidents under some
conditions if they are not followed. Therefore, be sure to observe all the safety caution items
described below.
About the pictograms
This symbol indicates the item for which caution must be exercised.
The pictogram shows the item to which attention must be paid.
This symbol indicates the prohibited action.
The prohibited item or action is shown in the illustration or near the symbol.
This symbol indicates the action that must be taken, or the instruction.
The instruction is shown in the illustration or near the symbol.
After the repair work is complete, be sure to conduct a test operation to ensure that the
equipment operates normally, and explain the cautions for operating the product to the
customer.
1.1.1 Cautions Regarding Safety of Workers
Warning
Be sure to disconnect the power cable plug from the plug socket before
disassembling the equipment for repair.
Working on the equipment that is connected to the power supply may cause an
electrical shook.
If it is necessary to supply power to the equipment to conduct the repair or
inspecting the circuits, do not touch any electrically charged sections of the
equipment.
If the refrigerant gas is discharged during the repair work, do not touch the
discharged refrigerant gas.
The refrigerant gas may cause frostbite.
When disconnecting the suction or discharge pipe of the compressor at the
welded section, evacuate the refrigerant gas completely at a well-ventilated
place first.
If there is a gas remaining inside the compressor, the refrigerant gas or
refrigerating machine oil discharges when the pipe is disconnected, and it may
cause injury.
If the refrigerant gas leaks during the repair work, ventilate the area. The
refrigerant gas may generate toxic gases when it contacts flames.
The step-up capacitor supplies high-voltage electricity to the electrical
components of the outdoor unit.
Be sure to discharge the capacitor completely before conducting repair work.
A charged capacitor may cause an electrical shock.
Do not start or stop the air conditioner operation by plugging or unplugging the
power cable plug.
Plugging or unplugging the power cable plug to operate the equipment may
cause an electrical shock or fire.