Alliance Air Conditioning Error Codes

Alliance AC Maintenance Dubai

Alliance Air Conditioning Error Codes & Trouble Shooting.

1. Fixed speed Vertu midwall units

E1 – EEPROM error
E2 – Zero crossing detection error
E3 – Indoor fan error
E5 – Room temp sensor open or short
E6 – Indoor coil sensor open or short
EC – Refrigerant leak detected

2. Atlantic Midwall units

E1 – Outdoor tube sensor fault
E2 – Room temp sensor open or short
E3 – Indoor coil sensor open or short
E5 – Indoor fan fault
E6 – EEPROM error
E7 – External feedback fault – Check interconnecting wiring
E8 – Overheat detection / defrosting

3. Inverter midwall Ac units

E0 – EEPROM error
E1 – Indoor and outdoor communication error
E2 – Zero crossing detection error
E3 – Indoor fan error
E4 – Indoor room temp sensor open or short
E5 – Indoor coil sensor open or short
EC – Refrigerant leak detected
F1 – Outdoor temp sensor open or short
F2 – Condensor coil sensor open or short
F3 – Compressor discharge sensor open or short
F4 – Outdoor EEPROM error
P0 – IPM malfunction or IGBT over current
P1 – Over or under voltage protection
P2 – Temperature protection of compressor top (normally short of refrigerant)
P4 – Inverter compressor drive error

4. Fixed speed under ceiling/cassette/ducted Ac units

E1 – EEPROM error
E2 – Zero crossing detection error
E3 – Indoor fan error
E5 – Room temp sensor open or short
E6 – Indoor coil sensor open or short
EC – Refrigerant leak detected

5. Inverter under ceiling/cassette/ducted units

E0 – Communication between indoor and outdoor
E1 – Phase rotation/phase missing
E2 – Communication error between indoor unit and master unit
E4 – Outdoor temp sensor error
E5 – Compressor discharge temp sensor
E8 – Outdoor unit address error
E9 – Power volt error
H0 – Communication malfunction between IR341 and 780034
H1 – Communication between 0537 or 9177 and 780034
H2 – Quantity of outdoor unit decreases
H3 – Quantity of outdoor unit increases
H4 – P6 protection detected 3 times
H5 – P2 detected 3 times in 30 minutes
H6 – P4 detected 3 times in 100 minutes
H7 – Indoor unit decrease error
H8 – Discharge pressure sensor error
H9 – P9 detected 3 times in 30 minutes
P0 – Inverter compressor top temperature protection
P1 – HP protection
P2 – LP protection
P3 – Inverter compressor current protection
P4 – Compressor discharge temp protection (short of refrigerant)
P5 – Outdoor condensor high temp protection
P6 – Inverter module protection
P7 – Current protection No.1 Fixed compressor
P8 – Current protection No.2 Fixed compressor
P9 – Fan motor protection
L0 – DC inverter module protection
L1 – DC supply low voltage
L2 – DC supply high voltage protection
L4 – MEC Failure
L8 – Frequency protection
L9 – Frequency protection

6. MAC Cassette Ac units

E2 – Room temp sensor failure
E3 – Coil temp sensor failure
E4 – Condensor sensor failure
E5 – Water pump temp sensor
E6 – Outdoor malfunction
E7 – EEPROM malfunction
E8 – Water-level alarm

7. Package Ac units

E0 – Phase rotation/phase missing
E1 – Outdoor coil sensor in system A
E2 – Outdoor coil sensor in system B
E5 – Indoor coil sensor in system A
E6 – Indoor coil sensor in system B
E9 – Indoor temp sensor error
EA – Outdoor ambient sensor error
EB – Wire controller output error
P0 – Overcurrent protection in system A
P1 – Overcurrent protection in system B
P2 – Overcurrent protection for outdoor fan
P3 – Comprehensive protection for outdoor fan
P4 – Protection for HP/LP or discharge temp in system A
P5 – Protection for HP/LP or discharge temp in system B
P6 – HP protection initiated inT2 evaporator stops the outdoor unit fan
P7 – HP protection initiated inT2 evaporator stops the outdoor unit fan and compressor
P8 – Protection for condenser at high temp in system A
P9 – Protection for condenser at high temp in system B
PC – Anti-freezing protection for evaporator in system A
PD – Anti-freezing protection for evaporator in system B
PF – Defrosting

8. Portable Air conditioning units

HP -HP alarm
Ft – Full tray or full tank
Pf – Probe failure
Lt – Low temp
E1 – Room temp sensor
E2 – Evaporator temp sensor
E3 – Condensor temp sensor
P1 – Bottom tray is full

8. Water heaters (Retro fit)

E1 – Phase reversal/phase missing error
E2 – Communication error between unit and wired control or sensor damaged
E3 – Outlet water temp sensor error
E4 – Water temp sensor failure in the water tank
E5 – Condensor temp sensor error
E6 – Outdoor ambient temp sensor error
E7 – Sensor failure at water pump outlet
E9 – T8 temp sensor error
Ed – Sensor failure at double pipe refrigerant outlet
P1 – HP protection/air in system/pump not starting/no water
P2 – System current protection
P4 – Tt HP protection
P5 – Condenser HP protection
P8 – Protection for over temp at condenser outlet
P9 – Anti-freezing protection
Pb – Anti-freezing protection
HO – Indoor and outdoor units unmatched

Swimming pool heaters Error Codes

E1 – Phase rotation/phase missing
E2 – Outdoor unit and wire controller communication error
E3 – Outlet water temp sensor error
E4 – Inlet water temp sensor error
E5 – Evaporator pipe temp sensor error
E7 – Ambient temp sensor error
E9 – Water flow switch error
EE – Discharge pipe temp sensor error
P0 – Discharge pressure over-high protection
P1 – Low pressure protection
P4 – Compressor over current protection
P6 – Evaporator over temp protection
Pb – Anti-freeze protection
Pf – Discharge temp protection (too high)

Integrated water heater Error/Fault Codes

E0 – Error of sensor T5U
E1 – Error of sensor T5L
E2 – Tank and wired controller communication error
E4 – Condensor pipe temp sensor error
E5 – Outdoor ambient temp sensor error
E6 – Sensor Tp error
E8 – Electric leakage protection
LA – Ambient temp is outside of range 5° _ 43°
P0 – Condensor pipe temp overflow protection
P2 – High dicharge temp
P3 – Open compressor circuit protection
P4 – Compressor overcurrent protection
P8 – Open upper e-heater circuit protection
P9 – Upper e-heater overloaded protection
Pa – Open lower e-heater circuit protection
Pb – Lower e-heater overloaded protection

Commercial water heater Fault/Error Codes

E1 – Phase rotation/phase missing
E2 – Communication failure between wired remote and main unit
E3 – Outlet water temp sensor failure
E4 – Water temp sensor in the water tank failure
E5 – Condenser temp sensor failure
E6 – Outdoor ambient temp sensor failure
E7 – Electric heating pipe temp sensor failure
Ec – Water inlet temp sensor error
Eb – Exhaust temp sensor error (TP temp)
P0 – System LP protection
P1 – System HP protection (deficient circulating pump/pump faulty also possible)
P2 – Current protection for system 2
P3 – Current protection for system 1
P8 – Protection for excessive high outlet water temp
Pb – Anti-freezing protection

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