When E:EE is displayed switch unit off and press the temp up and temp down buttons simultaneously for 3 seconds.
To Return to Normal Operation
Press Temp Up and Temp Down Buttons together for 3 seconds.
To Initiate Test Operation
Switch Unit Off & Press Master & Fan Buttons together for 3 seconds.
Press Start/Stop to Initiate.
Changing the Sensor Position
The unit can sense the air temperature at the unit or controller Turn Unit Off To change press THERMOSENSOR button for 5 seconds to unlock
Toggle the THERMOSENSOR button & controller is displayed Set to desired setting (unit or controller)
Press THERMOSENSOR button for 5 seconds to lock
Two Handsets/1 Unit - set on RC DIP SWs
Single handset DIP SW1 is On & 2 is Off
Dual Handset Master Both On & Slave both Off
Group Control up to 16 Unit from 1 RC Handset
Set DIP SW3 on RC to ON
Set Each ID Unit Rotary SW to Unit Address (0-15) in series
Auto Restart on Power Failure
DIP SW2-3 on ID Unit. Off is autorestart (std)/On is manual Restart
Auto Changeover
DIP SW5 on RC. On is autochangeover (std)/Off is Manual
Memory Retention on Power Failure
Dip SW6 on RC. On is Memory/Off is no memory
Wired Remote Control Models
Code Consists of Indoor Unit Address Followed by the Fault Code Below.
No E denotes no fault.
OO ID to RC Comms Fail
O1 ID to OD Comms Fail
O2 ID Air Sensor Open
O3 ID Air Sensor Close
O4 ID Pipe Sensor Open
O5 ID Pipe Sensor Close
O6 OD Pipe Sensor Fail
O8 Power Source Connection Failure
O9 Drain Problem
OA OD Air Sensor Fail
OC Discharge sensor Fail
OE Outdoor High Pressure
11 OD PCB Fail
12 ID Fan Fail
13 OD Signal Abnormal
14 OD EEPROM Fail
15 Compressor Temp Failure
16 Pressure Switch Error
17 IPM Error
18 CT Error
19 Active Filter Module Error
1A Compressor Failure
1B OD Fan Failure
1C Inverter to PCB Comms Fail
1D 2 Way Valve sensor Fail
1E Expansion Valve Error
1F Connection ID Unit Error
Outdoor PCB Fault Codes
Inverter OD Unit PCBs (1 red LED)
OD PCB LED Pulses = 1
Models 9-30 = Comms Failure
Models 36-54 = Comms Failure
OD PCB LED Pulses = 2
Models 9-30 = Disch Sensor Fail
Models 36-54 = Disch Sensor Fail
OD PCB LED Pulses = 3
Models 9-30 = Pipe Sensor Fail
Models 36-54 = Pipe Sensor Fail
OD PCB LED Pulses = 4
Models 9-30 = Air Sensor Fail
Models 36-54 = Air Sensor Fail
OD PCB LED Pulses = 5
Models 9-30 = 2 Way Valve Sensor
Models 36-54 =
OD PCB LED Pulses = 6
Models 9-30 = 3 Way Valve Sensor
Models 36-54 =
OD PCB LED Pulses = 7
Models 9-30 = Compressor Thermistor
Models 36-54 = Compressor Thermistor
OD PCB LED Pulses = 8
Models 9-30 = Pressure Switch
Models 36-54 = Heat Sink Sensor Fail
OD PCB LED Pulses = 9
Models 9-30 = Indoor Comms Error
Models 36-54 = Pressure Switch
OD PCB LED Pulses = 10
Models 9-30 = Current Trip
Models 36-54 =
OD PCB LED Pulses = 11
Models 9-30 = CT Fail
Models 36-54 =
OD PCB LED Pulses = 12
Models 9-30 = Compressor Position Fail
Models 36-54 = IPM Error
OD PCB LED Pulses = 13
Models 9-30 = Compressor Start Fail
Models 36-54 = Compressor Position Fail
OD PCB LED Pulses = 14
Models 9-30 = Timer Failure
Models 36-54 = Compressor Start Fail
OD PCB LED Pulses = 15
Models 9-30 =
Models 36-54 = OD Upper Fan Fail
OD PCB LED Pulses = 16
Models 9-30 =
Models 36-54 = OD Lower Fan Fail
OD PCB LED Pulses = Slow Blink
Models 9-30 =
Models 36-54 = Protect Operation
Non Inverter OD PCBs (2 red LEDs)
LED1 = Blinks
LED2 = Blinks
OD PCB Fail
LED1 = 1 Pulse
LED2 = Lit
Power Source Failure
LED1 = 2 Pulse
LED2 = Lit
OD Disch Temp Sensor
LED1 = 3 Pulse
LED2 = Lit
OD Pipe Sensor
LED1 = 4 Pulse
LED2 = Lit
OD Air Sensor
LED1 = 5 Pulse
LED2 = Lit
Comms Failure
LED1 = 6 Pulse
LED2 = Lit
Indoor Unit Error
LED1 = 7 Pulse
LED2 = Lit
High Discharge Temp
LED1 = 8 Pulse
LED2 = Lit
High Pressure
LED1 = 9 Pulse
LED2 = Lit
Compressor Temp Abnormal
LED1 = 10 Pulse
LED2 = Lit
Compressor Temp Sensor Fail
Inverter Multi AOY30
This has 4 LEDs A,B, C & D to denote which circuit has the fault
Up to 8 flashes - faults are identical to above 9-30 Single System
9 Pressure Switch A
10 Pressure Switch B
11 Indoor Unit Indexing Problem
12 IPM Fail
13 Compressor Position Fail
14 Compressor Fail
15 OD Fan Upper Fail
16 OD Fan Lower Fail
17 PCB Fail
Interconnecting Wiring
CO Multis 2 (Live) 1 (Neutral) 3 (Comms)
HP Multis 1 (Live) 2 (Neutral) 3 (Comms)
AOY90T 3 (Live) 2 (Neutral) 1 (Comms)
ALL OTHERS 1 or L 2 or N 3
We recommend external pumps have their own power supply.
Taking Power for a pump from the unit is a major source of Errors (CLIMATE CENTRE)
Pipework
• Pipe sizes and lengths should be as the relevant Technical Guide
• Both lines should be insulated
• No line accessories or oil traps should be fitted
• In cooling mode both pipes should be between 0 and 10C - the suction line should sweat, but not freeze
• In heating moded both pipes should be between 30 an 60C
• Pipework should be refrigeration quality
• Refrigerant should be R22, unless stated on the outdoor unit
• Look for restrictions. They could cause compressor failures.
Outdoor Unit
• Discharge temperature should be between 50 & 70C
• Suction temperature should be between -3 & 4C
• If fan switches off check for high discharge temperature
• Check Suction Line is sweating – problem if not!
• Hot Recip. Compressor = PROBLEM!
• Sweating/Frost on expansion line – undercharged
Indoor Unit
• Is it level? Have we adequate drainage?
• Smells are always due to site conditions or drains
• Flashing lights? = Fault Diagnostics - see over
• When were the filters last cleaned?
• Is the unit too large/small (between 5/20 air circs / hr)
• Is it on Timer/Test Mode
Controller
• EE:EE on LCD handset - fault diagnostics - see over
• Is the handset too far away?
• When were the batteries changed last?
• Heat Pump models 7-14 – NOT auto changeover
• Timer is one shot, unless it has ‘repeat’ mode
• With wired handset, check for interference. Cable should be screened
• Is it on Timer/Test Mode
Wiring
• In general interconnecting wiring is 240 Volt, but see chart for details
• With LCD wired handset models, Terminal 3 is the Live Not Terminal 1
NEVER apply mains voltage to Terminal 1 on these models
• With LCD wired handset models wiring should be screened
• Check Voltage drops! Check it isn’t down to Earth!
• Has it got a timeclock/BMS interface?
• Interconnecting cables MUST be circular crimped
What the separate Wires do in the interconnecting Cables
Note – Wires are 240V Live except where marked neutral or Earth or signal
Cables marked Signal are digital pulses and you should not attempt to measure these with a meter.
Wired Controllers - Fault diagnostics
A Fault Condition is signalled by EE:EE appearing on the LCD panel.
The unit should be interrogated by switching it off on the handset then
pressing either the down arrows on the SET TIME and TEMP/DAY buttons
together for 3 seconds for 7 day models or the ENERGY SAVE & ZONE
CONTROL buttons for other models.
The Failure code is in 2 parts - Fault and Address.
The Fault Code is an E code. The second is the unit address for multi
linked systems - with single units this is always 00. 7 day models have the
fault code as shown in the table below above the address.
Other models have the codes below, minus the 0, followed by the address
- e.g. E9:00 denoting Float Switch on Unit 0.
Code = E:0
Fault = I/U - R/C Comms
Diagnosis = Check R/C wiring. Interference?
Code = E:01
Fault = I/U - O/U Comms
Diagnosis = Check intercon. wiring. Interference
Code = E:02
Fault = Room Sensor Open
Diagnosis = Sensor Missing
Code = E:03
Fault = Room Sensor Short
Diagnosis = Sensor Faulty
Code = E:04
Fault = I/U Pipe Sensor Open
Diagnosis = Sensor Missing
Code = E:05
Fault = I/U Pipe Sensor Short
Diagnosis = Sensor Faulty
Code = E:06
Fault = O/U Pipe Sensor Open
Diagnosis = Sensor Missing
Code = E:07
Fault = O/U Pipe Sensor Short
Diagnosis = Sensor Faulty
Code = E:08
Fault = Power Source Error
Diagnosis = Incorrect Power Supply
Code = E:09
Fault = Float Switch
Diagnosis = Check Drains - High Water Level
Code = E:0A
Fault = O/U Air Sensor Open
Diagnosis = Sensor Missing
Code = E:0C
Fault = Disch Sensor Open
Diagnosis = Sensor Missing
Code = E:0D
Fault = Disch Sensor Short
Diagnosis = Sensor Faulty
Code = E:0F
Fault = High Disch Temp
Diagnosis = Contamination In Pipework/Gas Shortage
Code = E:11
Fault = Model Abnormal
Diagnosis = Check PCB compatability
Code = E:12
Fault = Indoor Fan Failure
Diagnosis = Check Fan and Motor
Code = E:13
Fault = O/D Signal Abnormal
Diagnosis = Communications?
Code = E:14
Fault = Outdoor PCB Fail
Diagnosis = PCB Failure
Outdoor Unit with
A fault condition is signified by flashing red LED’s on the the outdoor PCB
if it is equipped with one. Except for multisplits and 2 LED models, the
diagnostics are shown in the table on the right.
For 2 LED models flashing signifies sensor failure and constantly lit
indicates high discharge temperature.
Fault = Signal Failure
LED1 =
LED2 =
LED3 =
LED4 = Flash
LED5 =
LED6 =
Fault = Indoor Unit Failure
LED1 =
LED2 =
LED3 =
LED4 = Flash
LED5 =
LED6 =
Fault = Discharge Sensor Fail
LED1 =
LED2 =
LED3 =
LED4 =
LED5 =
LED6 = Flash
Fault = O/D Pipe Sensor Fail
LED1 =
LED2 =
LED3 =
LED4 =
LED5 = Flash
LED6 = Flash
Fault = O/D Air Sensor Fail
LED1 =
LED2 =
LED3 = Flash
LED4 =
LED5 = Flash
LED6 =
Fault = Power Source Error
LED1 =
LED2 = Flash
LED3 =
LED4 =
LED5 =
LED6 =
Fault = PCB
LED1 = Flash
LED2 = Flash
LED3 = Flash
LED4 = Flash
LED5 = Flash
LED6 = Flash
Fault = PCB Failure
LED1 = *
LED2 = *
LED3 = *
LED4 = *
LED5 = *
LED6 = * All Flashing Very Rapidly
Fault = High Pressure Trip
LED1 = Flash
LED2 =
LED3 =
LED4 =
LED5 =
LED6 =
Fault = Discharge Temp Trip
LED1 =
LED2 = Flash
LED3 =
LED4 =
LED5 =
LED6 =
Unit = All
Code Means:- = Power On
Red = On
Green = Off
Yellow = Off
Unit = All
Code Means:- = Timer Mode
Red = On
Green = On
Yellow = Off
Unit = All
Code Means:- = Louvre On
Red = On
Green = On or Off
Yellow = On
Unit = All
Code Means:- = HP Defrost Cont.
Red = Long pulses
Green = Off
Yellow = Off
Unit = All
Code Means:- = Test
Red = Cont. Pulse
Green = Cont. Pulse
Yellow = Off
Unit = D,E,F
Code Means:- = Power Fail
Red = On
Green = Cont Long
Yellow = Pulses Off
Unit = All
Code Means:- = PCB Failure
Red = Cont. Short Pulse
Green = Cont. Short Pulse
Yellow = Off
Unit = G
Code Means:- = Room Sensor Fault
Red = 1 Short Pulse
Green = Rapid Pulse
Yellow = Off
Unit = A,B,G
Code Means:- = Sensor Fault
Red = 2 Short Pulses
Green = Rapid Pulse
Yellow = Off
Unit = D,E,F
Code Means:- = Room Sensor Open/Fail
Red = 2 Short Pulses
Green = Rapid Pulse
Yellow = Off
Unit = E,F
Code Means:- = Room Sensor Short
Red = 2 Short Pulses
Green = Rapid Pulse
Yellow = Rapid Pulse
Unit = C
Code Means:- = Room Sensor Fault
Red = 3 Short Pulses
Green = Long Pulse
Yellow = Off
Unit = D,E,F
Code Means:- = Pipe Sensor Open
Red = 3 Short Pulses
Green = Rapid Pulse
Yellow = Off
Unit = E,F
Code Means:- = Pipe Sensor Short
Red = 3 Short Pulses
Green = Rapid Pulse
Yellow = Rapid Pulse
Unit = D,E,F
Code Means:- = High Water
Red = 4 Short Pulse
Green = Rapid Pulse
Yellow = Off
Unit = F
Code Means:- = Comms Failure
Red = 5 Short Pulses
Green = Rapid Pulse
Yellow = Off
Unit = G
Code Means:- = High Water
Red = 6 Short Pulses
Green = Rapid Pulse
Yellow = Off
Unit = B,E,F
Code Means:- = Fan Failure
Red = 6 Short Pulses
Green = Rapid Pulse
Yellow = Off
Unit = F
Code Means:- = 3ph Reversal
Red = Rapid Pulse
Green = 2 Short Pulses
Yellow = Off
Unit = C
Code Means:- = Pipe Sensor Fault
Red = Long Pulse
Green = 3 Short Pulses
Yellow = Off
Unit = F OD
Code Means:- = Pipe Sensor Open
Red = Rapid Pulse
Green = 3 Short Pulses
Yellow = Off
Unit = F OD
Code Means:- = Pipe Sensor Short
Red = Rapid Pulse
Green = 3 Short Pulses
Yellow = Rapid Pulse
Unit = F OD
Code Means:- = Temp Sensor Open
Red = Rapid Pulse
Green = 4 Short
Yellow = Pulses Off
Unit = F OD
Code Means:- = Temp Sensor Short
Red = Rapid Pulse
Green = 4 Short Pulses
Yellow = Rapid Pulse
Unit = F
Code Means:- = Discharge Sensor Open
Red = Rapid Pulse
Green = 5 Short Pulses
Yellow = Off
Unit = F
Code Means:- = Discharge Sensor Short
Red = Rapid Pulse
Green = 5 Short Pulses
Yellow = Rapid Pulse
Unit = F
Code Means:- = High/Low Pressure
Red = Rapid Pulse
Green = 6 Short Pulses
Yellow = Off
Unit = F
Code Means:- = High Discharge Temp
Red = Rapid Pulse 7
Green = Short Pulses
Yellow = Off
SENSOR RESISTANCES - Use to Check Thermistors across the range
Sensor At 10C At 20C At 30C
Air Temperature Sensors 20K Ohms 13K Ohms 8K Ohms
Indoor Pipe Sensor 103K Ohms 63K Ohms 40K Ohms
Outdoor Pipe Sensor 10K Ohms 6K Ohms 4K Ohms
Discharge Sensor 646K Ohms 395K Ohms 250K Ohms
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