Mitsubishi Heavy Industries SRK-ZSP-S User manual

SERVICE
SUPPORT
HANDBOOK
www.dwgeire.ie

MHI e-service
DCSL Software Ltd
Free
Compatibility
Iphone or Ipad on IOS9.3 or later
Android devices on 4.3 or later.
Screenshots
Description
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.
In addition this application enables you to scan unit's QR code and search the meaning
of error codes depending on the model type.
The application covers "Mitsubishi Heavy Industries Thermal Systems, Ltd" Air conditioning
systems: Split (RAC & PAC), VRF, Q-ton & A2W.
The MHI e-service app is a free download available from Google Play for Android devices
(4.03 or later), or the Apple App Store for IOS devices (IOS9.3 or later).
MHI e-service app

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" registered person.
Please do not remove any covers, or attempt any repair or measurement on any MHI
LTD. product, unless you are suitably qualified and licensed to do so.
Repairs made by unqualified persons can result in hazards to you and others.
Technical Assistance is available Monday to Friday
between the hours of 08:00 and 17:00
on 03301 235 598

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
RKX502A001C
SRK--ZJ-S, ZJ-S1, ZJX-S, ZJX-S1
SRK--ZM-S, SRK--ZMX-S, SRK--ZR-S
RLA502A701R
SRK--ZS-S
RLA502A701L
SRK--ZSX-S
RLA502A700K
SRF--ZMX-S
RLA502A700C
SRK--ZMP-S
RKX502A001P
SRK--ZSP-S
RKX502A007P
RKX502A001C

RKW502A200
RLA502A701R

RC-E5 Layout

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" button
All navigation is carried out using the "/\" and "\/" buttons above the "CHECK" button.
RAC Unit
Compatibility
01
MODE
Current operation mode
ok
02
SET TEMP
°C
Set temperature
ok
03
RETURN AIR
°C
Return air sensor temperature
ok
04
SENSOR
°C
Remote control sensor temperature
ok
05
THI-R1
°C
Indoor heat exchanger sensor (on U bend)
ok
06
THI-R2
°C
Indoor heat exchanger sensor (on Capillary)
ok
07
THI-R3
°C
Indoor heat exchanger sensor (on suction header)
-
08
I/U FANSPEED
Indoor unit fan speed
-
09
DEMAND
Hz
Required frequency
-
10
ANSWER
Hz
Response frequency
-
11
I/U EEV
PULSE
Pulse rate of KX indoor unit expansion valve
-
12
TOTAL I/U RUN
Hr
Total running hours of the indoor unit
-
21
OUTDOOR
°C
Outdoor air temperature
ok
22
THO-R1
°C
Outdoor unit heat exchanger sensor
ok
23
THO-R2
°C
Outdoor unit heat exchanger sensor
-
24
COMP
Hz
Compressor frequency
ok
25
HP
MPa
High pressure (x10=Bar)
-
26
LP
Mpa
Low pressure (x10=Bar)
-
27
Td
°C
Discharge Pipe Temperature
ok
28
COMP BOTTOM
°C
Compressor base temperature
-
29
CT
Amp
Current
ok
30
TARGET SH
°C
Target Super Heat
-
31
SH
°C
Super Heat temperature
-
32
TDSH
°C
Compressor discharge pipe super heat
ok
33
PROTECTION No
Protection state number of the compressor
-
34
O/U FANSPEED
Outdoor unit fan speed
ok
35
63H1
63H1 High pressure switch on/off
-
36
DEFROST
Defrost control on/off
ok
37
TOTAL COMP RUN
Hr
Total running hours of compressor
-
38
O/U EEV1
PULSE
Pulse rate of the outdoor unit expansion valve EEVC
ok
39
O/U EEV2
PULSE
Pulse rate of the outdoor unit expansion valve EEVH
-
No. Contents of display
0 Normal
1 Discharge pipe temperature protection control
2 Discharge pipe temperature anomaly
3 Current safe control of inverter primary current
4 High pressure protection control
5 High pressure anomaly
6 Low pressure protection control
7 Low pressure anomaly
8 Anti-frost prevention control
9 Current cut
10 Power transistor protection control
11 Power transistor anomaly (Overheat)
12 Compression ratio control
13 -
14 Condensation prevention control
15 Current safe control of inverter secondary current
16 Stop by compressor rotor lock
17 Stop by compressor startup failure
Details of 33 Compressor Protection Status
RC-E5 OPERATION DATA

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.
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.
RC-EX3 Layout

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. You can then select the indoor unit you want to view.
RAC Unit
Compatibility
01
MODE
Current operation mode
ok
02
SET TEMP
°C
Set temperature
ok
03
RETURN AIR
°C
Return air sensor temperature
ok
04
SENSOR
°C
Remote control sensor temperature
ok
05
THI-R1
°C
Indoor heat exchanger sensor (on U bend)
ok
06
THI-R2
°C
Indoor heat exchanger sensor (on Capillary)
ok
07
THI-R3
°C
Indoor heat exchanger sensor (on suction header)
-
08
I/U FANSPEED
Indoor unit fan speed
-
09
DEMAND
Hz
Required frequency
-
10
ANSWER
Hz
Response frequency
-
11
I/U EEV
PULSE
Pulse rate of KX indoor unit expansion valve
-
12
TOTAL I/U RUN
Hr
Total running hours of the indoor unit
-
21
OUTDOOR
°C
Outdoor air temperature
ok
22
THO-R1
°C
Outdoor unit heat exchanger sensor
ok
23
THO-R2
°C
Outdoor unit heat exchanger sensor
-
24
COMP
Hz
Compressor frequency
ok
25
HP
MPa
High pressure (x10=Bar)
-
26
LP
Mpa
Low pressure (x10=Bar)
-
27
Td
°C
Discharge Pipe Temperature
ok
28
COMP BOTTOM
°C
Compressor base temperature
-
29
CT
Amp
Current
ok
30
TARGET SH
°C
Target Super Heat
-
31
SH
°C
Super Heat temperature
-
32
TDSH
°C
Compressor discharge pipe super heat
ok
33
PROTECTION No
Protection state number of the compressor
-
34
O/U FANSPEED
Outdoor unit fan speed
ok
35
63H1
63H1 High pressure switch on/off
-
36
DEFROST
Defrost control on/off
ok
37
TOTAL COMP RUN
Hr
Total running hours of compressor
-
38
O/U EEV1
PULSE
Pulse rate of the outdoor unit expansion valve EEVC
ok
39
O/U EEV2
PULSE
Pulse rate of the outdoor unit expansion valve EEVH
-
No. Contents of display
0 Normal
1 Discharge pipe temperature protection control
2 Discharge pipe temperature anomaly
3 Current safe control of inverter primary current
4 High pressure protection control
5 High pressure anomaly
6 Low pressure protection control
7 Low pressure anomaly
8 Anti-frost prevention control
9 Current cut
10 Power transistor protection control
11 Power transistor anomaly (Overheat)
12 Compression ratio control
13 -
14 Condensation prevention control
15 Current safe control of inverter secondary current
16 Stop by compressor rotor lock
17 Stop by compressor startup failure
Details of 33 Compressor Protection Status
RC-EX OPERATION DATA

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. The remote control wires and all wires of the interconnecting cable go to each indoor unit
including the slave units.
When using RAC SRK indoor units, excluding ZMP/ZSP models, on a multisplit each indoor unit needs an SC-BIKN-E
interface to allow the installation of the wired remote control and setup of the master slave settings.
SYSTEM TYPE PAC Indoor Units SC-BIKN-E Interface
Unit SW5-1 SW5-2 SW3-1 SW3-2
Single Twin Triple Quad MASTER OFF OFF OFF OFF
Twin Triple Quad SLAVE 1 OFF ON OFF ON
Triple Quad SLAVE 2 ON OFF ON OFF
Quad SLAVE 3 ON ON ON ON
All indoor units on a multisplit system must be in the same space and operate off a single wired remote control as there is no
refrigerant control in the indoor units.
Group Settings
When multiple systems need to be controlled off a single RC-EX1A, RC-EX3 or RC-E5 wired remote control each system
needs to be given a different address. The system addressing is set on PAC unit indoor boards using SW2 or on RAC indoor
units via SW1 on the SC-BIKN-E interface. Upto 16 indoor units can be connected to a wired remote and that includes
multiplit systems using PAC outdoor units.
System Indoor Outdoor System Unit Group Address Master Slave
Unit Unit Type Switch Setting Switch #1 #2
1 FDT FDC Split Master SW2 0 SW5 OFF OFF
2 FDT FDC Quad Master SW2 1 SW5 OFF OFF
FDT Slave 1 SW2 1 SW5 OFF ON
FDT Slave 2 SW2 1 SW5 ON OFF
FDT Slave 3 SW2 1 SW5 ON ON
3 SRK FDC Twin Master SW1 2 SW3 OFF OFF
SRK Slave 1 SW1 2 SW3 OFF ON
4 FDUM FDC Split Master SW2 3 SW5 OFF OFF

Refrigerant Piping Information
RAC CURRENT MODELS
Model Precharged Maximum Maximum Vertical Factory Additional Pipe Sizes MCB
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) "" (mm) "" (mm) A
SRC25ZMP-S, 10 15 10 10 0.655 20 1/4" (6.35) 3/8" (9.52) 16
SRC35ZMP-S 15 15 10 10 0.810 N/A 1/4" (6.35) 3/8" (9.52) 16
SRC45ZMP-S 15 25 15 15 1.200 20 1/4" (6.35) 1/2" (12.7) 16
SRC25ZM-S 15 15 10 10 0.750 N/A 1/4" (6.35) 3/8" (9.52) 16
SRC35ZM-S 15 15 10 10 1.050 N/A 1/4" (6.35) 3/8" (9.52) 16
SRC50ZM-S 15 25 15 15 1.350 20 1/4" (6.35) 1/2" (12.7) 16
FDC100VNP 15 30 20 20 2.550 60 3/8" (9.52) 5/8" (15.88) 32
SRC20_35ZMX-S 15 15 10 10 1.200 N/A 1/4" (6.35) 3/8" (9.52) 16
SRC50_60ZMX-S 15 30 20 20 1.500 20 1/4" (6.35) 1/2" (12.7) 16
SRC63ZR-S 15 30 20 20 1.550 20 1/4" (6.35) 1/2" (12.7) 16
SRC71ZR-S 15 30 20 20 1.800 25 1/4" (6.35) 5/8" (15.88) 20
SRC80ZR-S 15 30 20 20 1.900 25 1/4" (6.35) 5/8" (15.88) 20
SRC20_25ZS-S 15 20 10 10 0.750 20 1/4" (6.35) 3/8" (9.52) 16
SRC35ZS-S 15 20 10 10 0.950 20 1/4" (6.35) 3/8" (9.52) 16
SRC50ZS-S 15 25 15 15 1.250 20 1/4" (6.35) 1/2" (12.7) 20
SCM Multi Splits
For SCM Systems the maximum one way piping length to an indoor unit is 25 metres.
Model Precharged Maximum Maximum Vertical Factory Additional Pipe Sizes MCB
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) "" (mm) "" (mm) A
SCM40ZS-S 30 30 15 15 1.900 N/A 2x 1/4" (6.35) 2x 3/8" (9.52) 25
SCM45ZS-S 30 30 15 15 1.900 N/A 2x 1/4" (6.35) 2x 3/8" (9.52) 25
SCM50ZS-S 40 40 15 15 2.500 N/A 3x 1/4" (6.35) 3x 3/8" (9.52) 25
SCM45ZM-S 30 30 15 15 2.000 N/A 2x 1/4" (6.35) 2x 3/8" (9.52) 25
SCM60ZM-S 40 40 15 15 2.500 N/A 3x 1/4" (6.35) 3x 3/8" (9.52) 25
SCM80ZM-S 40 70 20 20 3.150 20 4x 1/4" (6.35) 4x 3/8" (9.52) 25
SCM100_125ZM-S 50 90 20 20 6.000 20 5x 1/4" (6.35) 5x 3/8" (9.52) 32
PAC Splits - CURRENT MODELS
Model Precharged Maximum Maximum Vertical Factory Additional Pipe Sizes MCB
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) "" (mm) "" (mm) A(/ph)
FDC71VNP 15 30 20 20 1.600 20 1/4" (6.35) 1/2" (12.7) 20
FDC90VNP 15 30 20 20 2.100 20 1/4" (6.35) 5/8" (15.88) 20
FDC100VNP 15 30 20 20 2.550 60 3/8" (9.52) 5/8" (15.88) 32
FDC100VN 30 50 30 15 3.800 60 3/8" (9.52) 5/8" (15.88) 32
FDC125VN 30 50 30 15 3.800 60 3/8" (9.52) 5/8" (15.88) 32
FDC140VN 30 50 30 15 3.800 60 3/8" (9.52) 5/8" (15.88) 32
FDC71VNX 30 50 30 15 2.950 60 3/8" (9.52) 5/8" (15.88) 25
FDC100VNX 30 100 30 15 4.500 60 3/8" (9.52) 5/8" (15.88) 32
FDC125VNX 30 100 30 15 4.500 60 3/8" (9.52) 5/8" (15.88) 32
FDC140VNX 30 100 30 15 4.500 60 3/8" (9.52) 5/8" (15.88) 32
FDC100VS 30 50 30 15 3.800 60 3/8" (9.52) 5/8" (15.88) 20
FDC125VS 30 50 30 15 3.800 60 3/8" (9.52) 5/8" (15.88) 20
FDC140VS 30 50 30 15 3.800 60 3/8" (9.52) 5/8" (15.88) 20
FDC100VSX 30 100 30 15 4.500 60 3/8" (9.52) 5/8" (15.88) 20
FDC125VSX 30 100 30 15 4.500 60 3/8" (9.52) 5/8" (15.88) 20
FDC140VSX 30 100 30 15 4.500 60 3/8" (9.52) 5/8" (15.88) 20
FDC200VSA 30 70 30 15 5.600 60 3/8" (9.52) 7/8" (22.22) 32
FDC250VSA 30 70 30 15 7.200 120 1/2" (12.7) 1-1/8" (28.58) 32

Refrigerant Piping Information
Historic Models
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) "" (mm)
15 15 10 10 0.900 N/A 1/4" (6.35) 3/8" (9.52)
15 15 10 10 1.200 N/A 1/4" (6.35) 3/8" (9.52)
15 15 10 10 0.750 N/A 1/4" (6.35) 3/8" (9.52)
15 15 10 10 1.100 N/A 1/4" (6.35) 3/8" (9.52)
15 15 10 10 1.050 N/A 1/4" (6.35) 3/8" (9.52)
15 15 10 10 0.750 N/A 1/4" (6.35) 3/8" (9.52)
15 15 10 10 1.150 N/A 1/4" (6.35) 3/8" (9.52)
15 25 15 15 1.350 20 1/4" (6.35) 3/8" (9.52)
15 15 10 10 1.200 N/A 1/4" (6.35) 3/8" (9.52)
15 30 20 20 1.400 20 1/4" (6.35) 1/2" (12.7)
15 30 20 20 1.500 20 1/4" (6.35) 1/2" (12.7)
15 30 20 20 1.900 25 1/4" (6.35) 5/8" (15.88)
15 30 20 20 1.800 25 1/4" (6.35) 5/8" (15.88)
15 30 20 20 1.800 25 1/4" (6.35) 5/8" (15.88)
15 30 20 20 1.800 25 1/4" (6.35) 5/8" (15.88)
20 30 15 15 1.600 20 2x 1/4" (6.35) 2x 3/8" (9.52)
30 40 15 15 2.200 20 3x 1/4" (6.35) 3x 3/8" (9.52)
40 70 20 20 3.150 20 4x 1/4" (6.35) 4x 3/8" (9.52)
30 30 15 15 2.000 N/A 2x 1/4" (6.35) 2x 3/8" (9.52)
40 40 15 15 2.500 N/A 3x 1/4" (6.35) 3x 3/8" (9.52)
40 70 20 20 3.150 20 4x 1/4" (6.35) 4x 3/8" (9.52)
50 90 20 20 6.000 20 5x 1/4" (6.35) 5x 3/8" (9.52)
30 40 30 15 1.550 20 1/4" (6.35) 1/2" (12.7)
30 40 30 15 1.750 20 1/4" (6.35) 5/8" (15.88)
30 50 30 15 2.950 60 3/8" (9.52) 5/8" (15.88)
30 50 30 15 3.800 60 3/8" (9.52) 5/8" (15.88)
30 50 30 15 2.950 60 3/8" (9.52) 5/8" (15.88)
30 70 30 15 5.400 60 3/8" (9.52) 7/8" (22.22)
30 70 30 15 7.200 120 1/2" (12.7) 7/8" (22.22)
FDC71VN
FDC200VS
FDC250VS
SCM80ZG-S
SCM45ZJ-S
SCM60ZJ-S,S1
SCM80ZJ-S,S1
SCM100,125ZJ-S,S1
FDCVA151,201HEN
FDCVA251HEN
FDCVA302HENR,AR
FDCVA402_602HENR,AR
SRC20,25,35,ZIX,ZJX-S,ZJX-S1
SRC50,60ZFX,ZGX,ZHX,ZIX
SRC50,60ZJX-S
SRC63_71-S,S1
SRC63,71,80,ZK-S
SRC63ZM-S
SRC71_80ZM-S
SCM45ZG-S
SCM60ZG-S
Model
SRC20_25ZD,ZF,ZG
SRC20_325ZGX-S
SRC20,25ZJ-S
SRC35ZD,ZG
SRC35ZJ-S
SRC20ZJ-S1
SRC25,35ZJ-S1
SRC50ZD,ZG,ZJ-S,ZJ-S1

SRK
SRR/ SRF
SRC
Description of Trouble Possible Cause
Run Light
Timer
Light
Green Amber Red LED
- - - E1 Error of wired remote Broken wire, faulty indoor P.C.B., faulty controller.
OFF Flashing - E21 Limit Switch error
Defective limit switch, air inlet panel set, I/D
control PCB
1x ON - - Heat exchanger sensor (1) error
Broken heat exchanger sensor (1) wire, poor
connection
2x ON -E7 Room temperature sensor
Broken room temperature sensor wire, poor
connection
2x 2x 7x E60 Rotor lock
Faulty compressor, open phase on compressor,
faulty outdoor P.C.B.
3x ON - - Heat exchanger sensor (2) error
Broken heat exchanger sensor (2) wire, poor
connection
4x ON -E9 Drain Fault
Float switch activated, faulty pump, faulty PCB,
faulty float switch
5x ON 2x E47 Active Filter voltage error Defective Active Filter, incorrect power supply
6x ON - E16 Indoor fan motor error Fault indoor fan motor, poor connection
7x ON 2x E57
Refrigeration system protective
control
Service valve closed, refrigerant insufficient
7x 1x 4x E40
Service valve (gas side) closed,
defective outdoor PCB
Output current of inverter exceeds specification
Flashing 1x 8x E38 Outdoor air temp sensor Broken sensor wire, poor connection
Flashing 2x 8x E37 Outdoor heat exchanger sensor Broken sensor wire, poor connection
Flashing 4x 8x E39 Discharge pipe sensor Broken sensor wire, poor connection
ON 1x 1x E42 Current Cut
Compressor locking, open phase on compressor
output, short circuit on power transistor, closed
service valve, EEV not opening
ON 2x 2x E59 Trouble of outdoor unit
Broken compressor wire, broken power transistor,
broken discharge sensor wire/poor connection,
compressor blockage
ON 3x 3x E58 Current safe stop
Overload protection, over charged, compressor
locking
ON 4x 1x E51 Power Transistor error Faulty power transistor
ON 5x 5x E36 Over heat of compressor
Low on gas, faulty discharge pipe senor, closed
service valve
ON 6x 6x E3 / E5 Error of signal transmission
Defective power supply, broken signal wire,
faulty indoor/outdoor P.C.B.
ON 7x ON E48 Faulty outdoor fan motor Faulty condenser fan motor, poor connection
ON Flashing 2x E35 Cooling High Pressure Protection
Overload protection, over charged, broken
outdoor heat exchanger sensor wire, closed
service valve
Outdoor
Control
PCB,
Wired
Remote
Control
Inverter RAC
Outdoor Unit
ZD, ZE, ZE-S1, ZG, ZJ, ZJ-S1,ZM, ZR, ZS, ZFX, ZGX, ZHX, ZIX, ZJX, ZJX-S1,ZMX, ZSX
Indoor Unit Display
RAC FAULT CODES
ZD, ZE, ZE-S1, ZG, ZJ, ZJ-S1,ZM, ZMP, ZR, ZS, ZFX, ZGX, ZHX, ZIX, ZJX, ZJX-S1,ZMX, ZSX
ZIX, ZJX, ZJX-S1,ZMX
Inverter RAC
Indoor Unit

SRK ZJX-S, ZJX-S1 ZK-S
SRR
SRF
FDTC
FDUM
FDEN
SCM
Run Light
Timer
Light
Green Amber Red LED
- - - E1
Error of wired remote Control
- - 1 E41
Power transistor ov erheat
- - 2 E40
High pressure error
- - 4 E45
Outdoor main or sub PCB
communication error
- - 8 E54
High pressure sensor
-
Flashing - E21 Limit switch error
1x ON OFF -
Indoor heat exchanger sensor (1)
error
2x ON OFF -
Room temperature sensor
2x 2x 7x E60
Rotor lock
3x ON OFF -
Heat exchanger sensor 2 error
4x ON OFF E9
Drain error
5x ON 2x E47
Activ e filter v oltage error
6x ON OFF E16
Indoor fan motor error
7x ON 2x E57
Refrigerant cycle system protectiv e
control
Flashing 1x 8x E38 Outdoor air temperature sensor
Flashing 2x 8x E37 Outdoor heat exchanger sensor
Flashing 4x 8x E39 Discharge pipe sensor
Flashing 5x 8x E53 Outdoor suction sensor
ON 1x x1 E42
Current Cut
ON 2x 2x E59
Trouble of outdoor unit
ON 3x 3x E58
Current safe stop
ON 4x 1x E51
Power transistor error
ON 5x 5x E36
Ov er heat of compressor
ON 6x 6x E5
Error of signal transmission
ON 7x Flashing E48
Outdoor fan motor or main PCB
ON Flashing 2x E35
Cooling High Pressure Protection
Faulty power transistor or sensor.
Outdoor sub or main PCB faulty, poor connection of wires
between outdoor PCBs
Faulty high pressure sensor, faulty control PCB.
Broken sensor wire, poor connection, faulty outdoor PCB
Broken sensor wire, poor connection, faulty outdoor sub
PCB
Faulty compressor, open phase on compressor, faulty
outdoor P.C.B.
Defectiv e limit switch, air inlet panel set, I/D control PCB
Faulty high pressure sensor, faulty control PCB, poor air
circulation.
Broken wire, faulty indoor P.C.B., faulty controller.
Defectiv e Activ e Filter, incorrect power supply
Faulty indoor fan motor, poor connection
Closed serv ice v alv e, insufficient refrigerant
Broken sensor wire, poor connection, faulty outdoor PCB
Broken sensor wire, poor connection, faulty outdoor PCB
Ov erload protection, ov er charged, broken outdoor heat
exchanger sensor wire, closed serv ice v alv e
Broken heat exchanger sensor (1) wire, poor connection
Broken room temperature sensor wire, poor connection
Broken heat exchanger sensor 3 wire, poor connection
Blocked drain, faulty float switch, faulty drain pump
faulty inv erter PCB, faulty main PCB or faulty fan motor
Low on gas, faulty discharge pipe senor, closed serv ice
v alv e
Defectiv e power supply, broken signal wire, faulty
indoor/outdoor P.C.B.
Faulty condenser fan motor or faulty main PCB
Compressor locking, open phase on compressor output,
short circuit on power transistor, closed serv ice v alv e
Broken compressor wire, broken power transistor, broken
discharge sensor wire or poor connection, compressor
blockage
Ov erload protection, ov er charged, compressor locking
Possible Cause
Description of Trouble
Inverter Multi
Outdoor
ZJ-S, ZJ-S1, ZM-S
Indoor Unit Display
Outdoor
Control
PCB,
Wired
Remote
Control
ZJ-S,ZJ-S1,ZM-S,ZMX-S
ZJ-S
ZJX-S, ZJX-S1,ZMX-S
VD,VF, VF/1
VF, VF/1
VD, VF, VF/1
Inverter Multi
Indoor
RAC MULTISPLIT FAULT CODES - Current and Previous Models

SKM
SRRM
STM
SCM
Run Light
Timer
Light
Green Amber Red LED
- - - E1 Error of wired remote
Broken wire, faulty indoor P.C.B., faulty
controller.
1x ON OFF E6
Indoor heat exchanger sensor (1) error
Broken heat exchanger sensor (1) wire, poor
connection
2x ON OFF E7 Room temperature sensor
Broken room temperature sensor wire, poor
connection
2x 2x 7x E60 Rotor lock
Faulty compressor, open phase on
compressor, faulty outdoor P.C.B.
4x ON OFF E9 Drain error
Blocked drain, faulty float switch, faulty drain
pump
5x ON OFF E6
Indoor heat exchanger sensor (2) error
Broken heat exchanger sensor (2) wire, poor
connection
6x ON OFF E16 Indoor fan motor error Fault indoor fan motor, poor connection
7x ON OFF E6
Closed serv ice v alve, indoor
heat exchanger sensor (1)
Closed serv ice v alve, indoor heat exchanger
disconnected or open circuit
Flashing 1x Flashing E38 Outdoor air temperature sensor Broken sensor wire, poor connection
Flashing 2x Flashing E37 Outdoor heat exchanger sensor Broken sensor wire, poor connection
Flashing 4x
4 sec
on/off
E39 Discharge pipe sensor Broken sensor wire, poor connection
Flashing 5x Flashing E53 Compressor suction sensor Broken sensor wire, poor connection
Flashing 6x Flashing E41 Power transistor sensor error Broken sensor wire, poor connection
ON 1x 1x E42 Current Cut
Compressor locking, open phase on compressor
output, short circuit on power transistor, closed
service valve
ON 2x 2x E59 Trouble of outdoor unit
Broken compressor wire, broken power
transistor, broken discharge sensor wire or
ON 3x 3x E58 Current safe stop
Ov erload protection, over charged,
compressor locking
ON 4x 4x E41 Power transistor error Broken power transistor
ON 5x 5x E36 Ov er heat of compressor
Low on gas, faulty discharge pipe senor,
closed serv ice v alv e
ON 6x 6x E5 Error or signal transmission
Defectiv e power supply, broken signal wire,
faulty indoor/outdoor P.C.B.
ON 7x ON E48 Faulty outdoor fan motor Faulty condenser fan motor, poor connection
Inverter Multi
Outdoor
ZD-S, ZF-S, ZG-S
Indoor Unit Display
Outdoor
Control
PCB,
Wired
Remote
Control
Description of Trouble
Possible Cause
RAC MULTISPLIT FAULT CODES - Historic Models
ZD, ZF, ZG
ZE, ZF
ZE, ZF
Inverter Multi
Indoor

RED GREEN (1) RED GREEN (1)
Off Flashing Off Flashing - Normal Operation
Off Off 2x Off Indoor unit power supply
Power OFF, broken wire, blown fuse, broken
transformer wire
Remote controller wires Poor or wrong connection, broken wire
Remote controller Faulty Remote controller
Communication error
(indoor-outdoor)
Faulty interconnect wiring, faulty PCB
Remote Controller
Improper setting of master and slav e by
Remote Controller
E1 Off Flashing Off Flashing
Communication error
(indoor-remote control)
Poor or wrong connection, broken wire,
intrusion of noise, faulty indoor PCB or
2x Flashing 2x Flashing
Indoor - Outdoor
communication fault
Poor connection, incorrect wiring, indoor or
outdoor PCB
Electrical Noise CPU Runaway on Outdoor control PCB
Outdoor Control PCB
Faulty Outdoor Control PCB
(Communication Circuit)
2x Flashing Off Off Outdoor Control PCB Faulty Outdoor Control PCB or Power supply
E6 1x Flashing Off Flashing
Indoor heat exchanger
temp sensor
Faulty sensor, poor connection, faulty
indoor PCB
E7 1x Flashing Off Flashing Indoor return air temp
sensor
Faulty sensor, poor connection, faulty
indoor PCB
E8 1x Flashing Off Flashing
Indoor heat exchanger
temp sensor
Heating overload, faulty sensor, faulty
indoor PCB
E9 1x Flashing Off Flashing Float switch activated
Blocked drain, faulty pump, faulty indoor
PCB, faulty float switch
E10 Off Flashing Off Flashing
No. of indoor units
connected
Too many units connected to 1 controller
(MAX 16)
E14 3x Flashing Off Flashing Remote controller Fault
No master assigned to slav es, incorrect
wiring, broken wire between master &
E16 1x Flashing Off Flashing Indoor fan motor
Faulty Indoor fan motor, poor connection,
faulty indoor PCB
E18 1x Flashing Off Flashing Address Setting Error
Address setting error of master and slave
indoor units
E19 1x Flashing Off Flashing Mode Setting Incorrect mode setting
E20 1x Flashing Off Flashing Indoor fan motor
Fan motor speed fault or faulty indoor
Power PCB
E21 1x Flashing Off Flashing Panel Limit Switch error
Defective limit switch, air inlet panel set,
I/D control PCB
E28 Off Flashing Off Flashing
Remote Controller temp
sensor
Faulty Remote controller temp sensor
FDU
VF, VF/1, VG
FDUM
1, 1R, V, VD, VF, VF/1
PAC SELF-DIAGNOSIS INFORMATION
FDT
V, VD, VF, VF/1, VG
FDTC
V, VD, VF, VF/1,
Inverter
PAC
Indoor
Units
FDE
VG
FDEN
V, VD, VF, VF/1
Flashing
Off
Flashing
2x
E5
FDF
VD
Indoor PCB LEDs
Outdoor unit LEDs
Error Code
Description of Fault
Possible Cause
No Error
Code
"W AIT" or
"INSPECT I/U"
3x
Flashing
Off
Off
Flashing
2x
Flashing
Flashing

FDCVA
FDC
RED GREEN (1) RED GREEN (1) INV LED
E33 Off Flashing 1x Flashing - Power supply Anomalous current on inverter primary side
E34 Off Flashing 1x Flashing Flashing Power supply
Phase open circuit, faulty outdoor control
PCB (3 Phase model)
E35 Off Flashing 1x Flashing Flashing
Outdoor heat exchanger
thermistor
Overheat of condenser, faulty thermistor,
faulty outdoor PCB
E36 Off Flashing 1x Flashing Flashing Discharge pipe thermistor
High discharge temp, faulty sensor, faulty
outdoor control PCB
E37 Off Flashing 1x Flashing Flashing
Outdoor heat exchanger
thermistor
Poor connection, broken wire, faulty
thermistor, faulty PCB
E38 Off Flashing 1x Flashing Flashing Outdoor ambient air sensor
Poor connection, broken wire, faulty
thermistor, faulty PCB
E39 Off Flashing 1x Flashing Flashing Discharge pipe thermistor
Poor connection, broken wire, faulty
thermistor, faulty PCB
E40 Off Flashing 1x Flashing Flashing High Pressure Error
Activ ation of HP switch (63H1), closed
service v alv e, faulty PCB (63H1 Circuit)
E41 Off Flashing 1x Flashing 2 or 6x Power Transistor ov erheat Short circuit of air flow, faulty Inverter PCB
E42 Off Flashing 1x Flashing 1 or 5x Current Cut
Closed serv ice valv e, faulty outdoor
control PCB
E45 Off Flashing 1x Flashing Flashing
Communication Error -
Inverter to Control PCB
Poor Connection, faulty control or inv erter
PCBs
E47 Off Flashing 1x Flashing 7x Control PCB, Power
transistor Anomalous inverter ov er v oltage
E48 Off Flashing 1x Flashing Flashing Condenser fan motor Faulty fan motor or outdoor PCB
E49 Off Flashing 1x Flashing Flashing Low Pressure Error
Closed serv ice v alv e, short of gas, faulty LP
sensor, faulty outdoor control PCB
E51 Off Flashing 1x Flashing 2 or 6x Inverter Error Faulty Inverter PCB
E53 Off Flashing 1x Flashing Flashing Suction pipe thermistor
Poor connection, broken wire, faulty
thermistor, faulty PCB
E54 Off Flashing 1x Flashing Flashing Low Pressure Sensor Error
Closed serv ice v alv e, short of gas, faulty LP
sensor, faulty outdoor control PCB
E55 Off Flashing 1x Flashing Flashing
Under-dome temp
thermistor
Poor connection, broken wire, faulty
thermistor, faulty PCB
E57 Off Flashing 1x Flashing Flashing Low Pressure Error Insufficient refrigerant
E59 Off Flashing 5x Flashing Off or 4x Compressor start up error Faulty power supply, faulty inv erter circuit.
E60 Off Flashing 1x Flashing - Compressor Faulty compressor, faulty inverter circuit.
E75 Off Flashing Off Flashing -
Central Controller
communication error
Poor connection, broken wire, faulty
controller
Error Code
Description of Fault
Possible Cause
Inverter PAC
Outdoor
PAC SELF-DIAGNOSIS INFORMATION
HEN, HENR, HENAR
VN, VNP, VS, VSA, VNX,VSX
Indoor PCB LEDs
Outdoor unit LEDs

SRC
Run Light Timer Light
Green Amber Red LED
Installation, operation status Higher outdoor heat exchanger temp
Outdoor heat exchanger temp
sensor
Faulty outdoor heat exchanger temp sensor
Outdoor control PCB
Faulty outdoor control PCB (temperature
sensor input circuit)
Installation, operation status Higher discharge temperature
Discharge pipe temperature
sensor
Faulty discharge pipe sensor
Outdoor control PCB
Faulty outdoor control PCB (temperature
sensor input circuit)
Outdoor heat exchanger temp
sensor
Faulty outdoor heat exchanger temp sensor,
broken wire or poor connection
Outdoor control PCB
Faulty outdoor control PCB (temperature
sensor input circuit)
Outdoor air temperature sensor
Faulty outdoor air temp sensor, broken wire or
poor connection
Outdoor control PCB
Faulty outdoor control PCB (temperature
sensor input circuit)
Discharge pipe temperature
sensor
Faulty discharge pipe sensor, broken wire,
poor connection
Outdoor control PCB
Faulty outdoor control PCB (temperature
sensor input circuit)
Outdoor control PCB,
compressor
Current cut (anomalous compressor over
current)
Installation, operation status Service valv e closing operation
E47 Off Flashing 2x
Outdoor control PCB, power
transistor
Anomalous inverter ov er current
Outdoor fan motor Faulty outdoor fan motor
Outdoor control PCB Faulty outdoor control PCB
E51 Off Flashing 1x
Power transistor, outdoor control
PCB
Power transistor error
Operation status Shortage of refrigerant
Installation status Serv ice v alv e closed
E58 Off Flashing 3x Current safe stop
Overload operation, ov er charge,
compressor locking
E59 Off Flashing 2x Compressor, outdoor control PCB Anomalous compressor start up
E60 Off Flashing 7x Compressor Anomalous compressor rotor lock
E57
Off
Flashing
2x
Error Code
Location of trouble
Description of trouble
8x
Flashing
Off
E39
1x
Flashing
Off
E42
E48
Off
Flashing
Flashing
E35
2x
Flashing
Off
E36
Off
Flashing
5x
E37
8x
Flashing
Off
E38
Off
Flashing
8x
PAC SELF-DIAGNOSIS INFORMATION
Inverter PAC
Outdoor
ZHX-S, ZIX-S, ZJX-S,ZMX-S, ZSX-S
Indoor Unit Display
Outdoor
Control
PCB,

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 FDK71-90KXZE1
The 'TIMER/CHECK' LED on the KX6 indoor units will flash continously to indicate there is a fault.
On both the KX6 and the KXZE1high wall units the actual error code is indicated by the number of flashes (0.5s on/0.5s off) in a 10second period of the 'CHECK1'/ 'RUN/CHECK1' (tens) and the 'CHECK2'/ 'TIMER / CHECK2' (ones) LEDs.
ie An E39 High Discharge fault would be indicated as follows
KX6 KXZE1 Flash Rate
On Off
CHECK1 RUN/CHECK1
(Orange (Green)
CHECK2 TIMER/CHECK2
(Orange) (Orange)
0.5s
0.5s
0.5s
0.5s
Error Code
O/D 7
segment
display
Green Red Green Red Location of Trouble Probable Causes
E1
keeps
flashing
stays off
keeps
flashing
stays off
Communication error (indoor-
remote control)
Poor or wrong connection, broken wire, intrusion
of noise, faulty indoor PCB or remote control
E2
keeps
flashing
keeps
flashing
keeps
flashing
stays off Duplicated indoor unit address
Number of connected indoor units exceeds the
limitation, duplicated indoor unit address,
indoor control PWB anomaly.
E3
keeps
flashing
2x or stays
off
keeps
flashing
stays off Outdoor unit signal line error
Power not supplied to the O/D unit, mismatch
of pairing between I/D and O/D units, indoor
control PWB anomaly, Outdoor control PWB
anomaly, Missing local wiring.
E5
keeps
flashing
2xor stays
off
keeps
flashing
2x
Communication error during
operation
Unit address number setting error, remote
control wires broken, poor
connection/disconnection of remote control
wires, indoor control PWB anomaly
E6
keeps
flashing
1 x
keeps
flashing
stays off
Indoor heat exchanger
thermistor anomaly
Anomalous connection of I/D heat exchanger
temperature thermistor, I/D heat exchanger
thermistor anomaly, I/D control PWB anomaly
E7
keeps
flashing
1x
keeps
flashing
stays off
Indoor return air temperature
thermistor anomaly
Anomalous connection of I/D return air
temperature thermistor, I/D return air thermistor
anomaly, I/D control PWB anomaly
E9
keeps
flashing
1x
keeps
flashing
stays off Drainage trouble
I/D control PWB anomaly, Mistake in setting of
float switch, mistake in setting of optional
equipment, mistake in drain piping, drain motor
anomaly, disconnection/breakage of drain
motor wires
E10
keeps
flashing
stays off
keeps
flashing
stays off
Excessiv e number of indoor
units (more than 17 units) by
controlling one remote control
Excessiv e number of I/D units, remote control
anomaly
E11
keeps
flashing
stays off
keeps
flashing
stays off
Address setting error between
master and slav e indoor units
IU address has been set using the "Master IU
address set" function of remote control
E12
keeps
flashing
keeps
flashing
keeps
flashing
stays off
Address setting error by mixed
setting method
Automatic address setting and manual address
setting method are mixed when setting address
of indoor units
E16
keeps
flashing
1x
keeps
flashing
stays off
Indoor fan motor anomaly
(FDT, FDTC, FDTW, FDTS, FDU,
FDUM, FDK, FDUT71, FDFW
series)
I/D fan motor anomaly, foreign matter at
rotational area of fan propeller, fan motor
anomaly, dust on control PWB, blown fuse,
external noise, surge
E18
keeps
flashing
1x
keeps
flashing
stays off
Address setting error of master
and slav e indoor units
Address setting error of the master indoor unit,
no power to the master indoor unit, no
connection of super link signal wires between
master and slav e indoor unit
E19
keeps
flashing
1x
keeps
flashing
stays off
Indoor unit operation check
drain motor check mode
anomaly
Mistake in SW7-1 setting due to forgetting to
turn off SW7-1 after indoor operation check
KX SELF-DIAGNOSIS INFORMATION
FDCA----HKXE4_HXKRE4. FDC----KXEN6, KXE6, KXRE6, KXZE1, KXZPE1,
KXZRE1
Inverter KX
LED Display
Indoor PCB
Outdoor PCB
KX SELF-DIAGNOSIS INFORMATION