Table of Contents
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Table of Contents
Related Manuals for Mitsubishi Heavy Industries SRK-ZSP-S
Summary of Contents for Mitsubishi Heavy Industries SRK-ZSP-S
- Page 1 SERVICE SUPPORT HANDBOOK www.dwgeire.ie...
- Page 2 MHI e-service is an application that enables users to make a quick search of the meaning of error codes that may appear when there is a malfunction in "Mitsubishi Heavy Industries Thermal Systems, Ltd" Air conditioning system, and the probable cause of the malfunction.
- Page 3 WARNING The information contained in this ‘Service Support Handbook’ is intended for use by qualified service technicians familiar with safety procedures and equipped with the proper tools and test instruments. Additionally, the information presented here is not a replacement for, nor a substitute to the Manufacturers Technical Manuals. MHI Air Conditioners contain pressurized refrigerants that are harmful to the atmosphere so all refrigeration works must be performed by a qualified "F-Gas"...
- Page 4 Hi-Wall Mounted Split Systems - Remote Controls of SRK Before Proceeding to RAC Self Diagnosis Information, ensure the correct Remote Control is being used. Indoor Model Remote Control SRK--HC-S, HC-S1, HD-S, ZD-S, SKM--ZD-S RMA502A001 SRK--HG-S RKX502A007B SRK--ZE-S, SRK--ZE-S1, SRK--ZR-S RKW502A200D SRK--ZFX-S, SRK--ZGX-S RKW502A200B SRK--ZG-S, ZHX-S, ZIX-S...
- Page 5 RKW502A200 RLA502A701R...
- Page 6 RC-E5 Layout...
- Page 7 RC-E5 OPERATION DATA To access the RC-E5 Remote Controls Operation Data function, press the "CHECK" button on the MASTER remote control. On 'Operation data' press the "SET" button. If 'I/U No' is displayed select the unit number required, using the "/\" and "\/" buttons above the "CHECK" button, then press the "SET"...
- Page 8 RC-EX1 & EX1A Layout Touch panel control, which is operated by tapping the LCD screen with a finger, is employed for all functions except 1 On/Off switch, 2 Hi Power switch and 3 ECO switch.
- Page 9 RC-EX3 Layout Touch panel control, which is operated by tapping the LCD screen with a finger, is employed for all functions except 1 On/Off switch, 2 Hi Power switch and 3 ECO switch.
- Page 10 RC-EX OPERATION DATA To access the RC-EX Remote Controls Operation Data function, press MENU on the MASTER remote control Front Screen. Then press NEXT followed by SERVICE (RC-EX3 only) and SERVICE & MAINTENANCE. Enter the service pass code, press SET then press OPERATION DATA.
- Page 11 Master/ Slave and Group Settings Master / Slave Settings All split system indoor units are supplied set up as a master unit as default and this only needs changing when the system being installed is a multisplit system, excluding SCM or KX systems, comprising of 2 to 4 RAC or PAC indoor units running off a PAC single split outdoor unit.
- Page 12 Refrigerant Piping Information RAC CURRENT MODELS Model Precharged Maximum Maximum Vertical Factory Additional Pipe Sizes Piping Piping Piping Length (m) Charge Charge R410A Liquid Pipe Gas Pipe Rating Length (m) Length (m) O/D Above I/D Above R410A (kg) per m (g/m) ""...
- Page 13 Refrigerant Piping Information Historic Models Model Precharged Maximum Maximum Vertical Factory Additional Pipe Sizes Piping Piping Piping Length (m) Charge Charge R410A Liquid Pipe Gas Pipe Length (m) Length (m) O/D Above I/D Above R410A (kg) per m (g/m) "" (mm) ""...
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Page 14: Indoor Unit
RAC FAULT CODES ZD, ZE, ZE-S1, ZG, ZJ, ZJ-S1,ZM, ZMP, ZR, ZS, ZFX, ZGX, ZHX, ZIX, ZJX, ZJX-S1,ZMX, ZSX Inverter RAC Indoor Unit ZIX, ZJX, ZJX-S1,ZMX SRR/ SRF Inverter RAC ZD, ZE, ZE-S1, ZG, ZJ, ZJ-S1,ZM, ZR, ZS, ZFX, ZGX, ZHX, ZIX, ZJX, ZJX-S1,ZMX, ZSX Outdoor Unit Wired Indoor Unit Display... - Page 15 RAC MULTISPLIT FAULT CODES - Current and Previous Models ZJ-S,ZJ-S1,ZM-S,ZMX-S ZJX-S, ZJX-S1 ZK-S ZJ-S Inverter Multi ZJX-S, ZJX-S1,ZMX-S Indoor FDTC VD,VF, VF/1 VF, VF/1 FDUM FDEN VD, VF, VF/1 Inverter Multi ZJ-S, ZJ-S1, ZM-S Outdoor Wired Description of Trouble Possible Cause Indoor Unit Display Outdoor Remote...
- Page 16 RAC MULTISPLIT FAULT CODES - Historic Models ZD, ZF, ZG Inverter Multi ZE, ZF SRRM Indoor ZE, ZF Inverter Multi ZD-S, ZF-S, ZG-S Outdoor Wired Description of Trouble Possible Cause Indoor Unit Display Outdoor Remote Control Timer Run Light Control PCB, Light Red LED...
- Page 17 PAC SELF-DIAGNOSIS INFORMATION V, VD, VF, VF/1, VG FDTC V, VD, VF, VF/1, Inverter VF, VF/1, VG FDUM 1, 1R, V, VD, VF, VF/1 Indoor Units FDEN V, VD, VF, VF/1 Description of Fault Possible Cause Error Code Indoor PCB LEDs Outdoor unit LEDs GREEN (1) GREEN (1)
- Page 18 PAC SELF-DIAGNOSIS INFORMATION Inverter PAC HEN, HENR, HENAR FDCVA Outdoor VN, VNP, VS, VSA, VNX,VSX Error Code Indoor PCB LEDs Outdoor unit LEDs Description of Fault Possible Cause GREEN (1) GREEN (1) INV LED Flashing Flashing Power supply Anomalous current on inv erter primary side Phase open circuit, faulty outdoor control Flashing Flashing...
- Page 19 PAC SELF-DIAGNOSIS INFORMATION Inverter PAC ZHX-S, ZIX-S, ZJX-S,ZMX-S, ZSX-S Outdoor Outdoor Error Code Location of trouble Description of trouble Indoor Unit Display Control Run Light Timer Light PCB, Red LED Green Amber Installation, operation status Higher outdoor heat exchanger temp Outdoor heat exchanger temp Flashing Faulty outdoor heat exchanger temp sensor...
- Page 20 KX SELF-DIAGNOSIS INFORMATION KX High Wall Indoor Units on Wireless Remote Control When fitted with the wireless remote control kit the high wall units do not show the error code on an digital readout. The error code is indicated in the following manner. FDK15-56KXE6 FDK71KXE6 FDK15-56KXZE1...
- Page 21 KX SELF-DIAGNOSIS INFORMATION LED Display Inverter KX FDCA----HKXE4_HXKRE4. FDC----KXEN6, KXE6, KXRE6, KXZE1, KXZPE1 Indoor PCB Outdoor PCB Error Code O/D 7 Green Green Location of Trouble Probable Causes segment display Indoor fan motor speed I/D fan motor anomaly, foreign matter at keeps keeps anomaly (FDT, FDTC, FDTW,...
- Page 22 KX SELF-DIAGNOSIS INFORMATION LED Display FDCA----HKXE4_HXKRE4. FDC----KXEN6, KXE6, KXRE6, KXZE1, KXZPE1, Inverter KX KXZRE1 Indoor PCB Outdoor PCB Error Code O/D 7 Green Green Location of Trouble Probable Causes segment keeps keeps Excessiv e number of indoor E43-1 stays off flashing flashing units connected...
- Page 23 KX SELF-DIAGNOSIS INFORMATION LED Display FDCA----HKXE4_HXKRE4. FDC----KXEN6, KXE6, KXRE6, KXZE1, KXZPE1, Inverter KX KXZRE1 Indoor PCB Outdoor PCB Error Code O/D 7 Green Green Location of Trouble Probable Causes segment display KX4 & KX6 Product. If it fails to detect the rotor Keeps Keeps Rotor position detection error,...
- Page 24 Test Procedure – Inverter Checker Compatibility 1. RAC 2. PAC Model Type (FDC***VN, VS, VNX, VSX) SRC ZG-S, ZGX-S, SCM ZG-S Capacity Type SCM100~125ZJ-S1 SRC40~60ZJX-S, SRC63~80ZK-S 71VN/VNX SRC20~50ZJ-S/C, SRC25~60ZJX-S/C 71~100VNP SRC25~45ZJP-S1, SCM40-80ZJ-S/C 100, 125, 140 SRC40~60ZHX, SRC40~60ZIX-S 200, 250 SRC20~50ZJ-S, SRC25~35ZJX-S SRC25~45ZJP-S, SCM40~80ZJ-S 2.
- Page 25 Test Procedure – Using an Inverter Checker Type B - FDC VN, VS, VNA, VSA, VNX, VSX & KX6 Outdoor Units Testing Method Setup Procedure Turn off the power to the system. Remove the terminal cover from the compressor and disconnect the wires U, V and W. Connect the disconnected wires to the inverter checker U (Red), V (White) and W (Black).
- Page 26 Test Procedure – 1PH & 3PH Diode Module “WARNING” Power off the unit, waiting a minimum 3 minutes before removing any applicable wiring. Ensure to measure that the DC voltage has discharged sufficiently before carrying out the below testing. 1 Phase Diode Module Test No.
- Page 27 Test Procedure – 3 PH Transistor Module “WARNING” Power off the unit, waiting a minimum 3 minutes before removing any applicable wiring. Ensure to measure that the DC voltage has discharged sufficiently before carrying out the below testing. Measure the resistance of the points shown in the following table using a circuit tester. P, N, U, V and W are the terminal No.
- Page 28 Test Procedure – Electronic Expansion Valve “WARNING” Power off the unit, waiting a minimum 3 minutes before removing any applicable wiring. Ensure to measure that the DC voltage has discharged sufficiently before carrying out the below testing. Measure the resistance points as per the following table by Multimeter.
- Page 29 DC FAN MOTOR TESTING Expected Readings of Control PWB VDC Outputs t o Expected Readings of DC Fan Motor Circuit Board DCFM Resistances Multi Meter Test Points for VDC Multi Meter Test Points for Ω Multimeter Red Multimeter Multimeter Multimeter DCFM PWB Resistance PCB DC Volts Value...
- Page 30 DC FAN MOTOR TESTING Type “A” Fan Motor Type “B / C” Fan Motor Type B (RAC) Type C (PAC) Type ‘D’ Fan Motor...
- Page 31 DC FAN MOTOR TESTING KX Models Outline of the driver circuit Resistance of motor's coil Connection Table of Sensor Lead Wires : Reverse turn detection output : Speed command output : RPM monitor input Over C : Over - current error input Connection Table of Power Lead Wires...
- Page 32 TROUBLE SHOOTING REFRIGERATION SYSTEM Refrigerant Pressure Cause Location Extra Low Normal High Extra High Excessive refrigerant overcharge • High Side Non condensibles in the system Faulty outdoor fan motor • High Side Blocked outdoor unit heat exchanger Liquid flooded outdoor heat exchanger High indoor return air temperature •...
- Page 33 THERMISTOR TEMPERATURE & RESISTANCE CHARACHERISTICS Indoor Return Air Sensor (THI-A1) Remote Control Temperature Sensor (ThC) Indoor Heat Exchanger Sensor (THI-R1, R2 & R3) Outdoor Air Temperature Sensor (THO-A) RAC Outdoor Heat Exchanger Sensor (THO-R1, R2, R3 & R4) Outdoor Suction Pipe Sensor (THO-S & THO-H) Resistance-temperature characteristics Temperature °C Resistance KΩ...
- Page 34 SERVICE MODE Hi-Wall Mounted Inverter Split Systems - – SRK (R410A Models only) Term Explanation The service mode is the mode where service data are displayed by flashing lights when the operations Service Mode described below are performed with the indoor controller These are the contents of error displays and protective stops which occurred I the past in the system.
- Page 35 *3: To Count the number of flashes in the service mode, count the number of flashes after the light lights up for 1.5 sec initially (start signal). Do not count start signal. • In the case of current cut (example: stop code “42”) The RUN light (10’s digit) flashes 4 times and the TIMER light (1’s digit) flashes 2 times.
- Page 36 ERROR CODE DATA Remote Control Setting Displayed Data Operation Fan Speed Temperature Switching Switching Setting Displays the reason for the stop the previous time an error 21ºC code was displayed Displays the reason for the stop 2 times previous time an error 22ºC was displayed Displays the reason for the stop 3 times previous time an error...
- Page 37 SENSOR TABLE Room temperature sensor, indoor heat exchanger sensor, outdoor air temperature sensor, outdoor heat exchanger sensor. Buzzer sound Run light Timer Light (1’s digit) (10’s digit) (sounds for 0.1 second) (does not sound) SENSOR TABLE Discharge Pipe Sensor Buzzer sound Run light Timer Light (1’s digit) (10’s digit)
- Page 38 SERVICE DATA RECORD FORM Customer Model number Date of Investigation Serial number Content of Complaint Content of displayed data Display Remote Control Settings Display results content Temp Operation Fan speed Buzzer RUN light TIMER light setting Mode Setting Yes/No (Times) (Times) Error code on previous occasion Cooling...
- Page 39 SERVICE MODE ERROR CODE & STOP CODE TABLE Models ZE-S, ZE-S1 ZD-S, ZF-S, ZG-S ZFX-S, ZGX-S Number of Flashes Stop or Cause Occurrence Conditions Error Content (in Service Mode) Error Code Major Minor Category Category Run LED Timer LED (Green) (Amber) Comp Lock, W iring short, Compressor start fails 42 times in...
- Page 40 SERVICE MODE ERROR CODE & STOP CODE TABLE Models ZE-S, ZE-S1 ZD-S, ZF-S, ZG-S ZFX-S, ZGX-S Number of Flashes Stop or Cause Occurrence Conditions Error Content (in Service Mode) Error Code Major Minor Category Category Run LED Timer LED (Green) (Amber) W hen there is a current safe stop Cooling current safe 3...
- Page 41 SERVICE MODE ERROR CODE & STOP CODE TABLE Models ZE-S, ZE-S1 ZD-S, ZF-S, ZG-S ZFX-S, ZGX-S Number of Flashes Stop or Cause Occurrence Conditions Error Content (in Service Mode) Error Code Major Minor Category Category Run LED Timer LED (Green) (Amber) After the compressor starts, Compressor faulty.
- Page 42 SERVICE MODE ERROR CODE & STOP CODE TABLE Models ZJ-S, ZJ-S1,ZM-S, ZS-S ZHX-S, ZIX-S, ZJX-S,ZMX-S, ZSX-S ZK-S, ZM-S, ZR-S Number of Flashes Stop or Error Content Cause Occurrence Conditions (in Service Mode) Error Code Run LED Timer LED (Green) (Amber) Normal Cannot receiv e signals W hen 35 sec passes without...
- Page 43 SERVICE MODE ERROR CODE & STOP CODE TABLE Models ZJ-S, ZJ-S1,ZM-S, ZS-S ZHX-S, ZIX-S, ZJX-S,ZMX-S, ZSX-S ZK-S, ZM-S, ZR-S Number of Flashes Stop or Error Content Cause Occurrence Conditions (in Service Mode) Error Code Run LED Timer LED (Green) (Amber) Short circuit in the power W hen it is judged that the power Outdoor PCB is faulty, power transistor...
- Page 44 PFD Box Replacement Compatibility for PFD BOX Outdoor unit Indoor unit PFD BOX Super link Compatibility Remark Requires wiring modification KXR4A KX6 / KXZE1 Requires wiring modification KXR6 KX6 / KXZE1 KXZR1 KX6 / KXZE1 OLD PFD BOX = PFD***E, PFD***ER or PFD112X4ER NEW PFD BOX = PFD***3E, PFD***4E, PFD1123X4 or PFD1124X4 PFD Box Connection The PFD boxes are supplied with a Relay box that converts 12Vdc outputs from the indoor units CNT or CNT2 connector into 240V...
- Page 45 Applying New PFD box to KXRE4 Systems When replacing a PFD***E or PFD***ER branch control box on a KXRE4 system with the newer style PFD boxes the wiring needs modifying as KX4 indoor units do not have the CNT2 connection only CNT so the new relay box is incompatible. It is therefore imperative that the existing relay box is in good condition AND is of the 4 wire type as it will need to be re-used.
- Page 46 CNT 6 Wire Adaptor For remotely starting, stopping and monitoring the unit state. 6 Wire Adapter Kit for MHI Indoor Units. Installation Guide. This kit provides the wiring connection to the indoor unit printed circuit board (PCB) or an SC-BIKN-E interface to allow remote start/stop control and basic status monitoring.
- Page 47 Changing Operation of the CnT connector, 635566’s, On/Off Control. The On/Off operation characteristics can be changed by either setting Jumper1 and Jumper3 (or SW7-1 and SW7-3 if fitted) on the indoor PCB or via the “IU Function settings” menu on the wired remote control RC-E5, RC-EX1A or RC-EX3. To make the setting via the wired remote control please see the remote control installation instructions.