McQuay Air
Conditioner Error Codes
Error Codes
|
Trouble
|
E1
|
Compressor 2 low pressure faulty
|
E2
|
Compressor 2 high pressure faulty
|
E3
|
Compressor 2 overload
|
E4
|
Indoor coil 2 temperature sensor fault
|
E5
|
System 2 leaving water temperature 2 faulty
|
F2
|
Indoor coil 1 temperature sensor fault
|
F4
|
Return air temperature sensor fault
|
F6
|
Communication faulty
|
F9
|
Compressor 1 refrigerant leak
|
FE
|
Compressor 2 refrigerant leak
|
H1
|
Compressor 1 high pressure faulty
|
H4
|
Compressor 1 low pressure faulty
|
L1
|
Temperature of water entering too high or low
|
L3
|
Water flow switch faulty
|
L4
|
System 1 leaving water temperature 1 faulty
|
Wall Mounted
K-Series Inverter-Y model
McQuay
AC Error Code Diagnosis
00: Normal
UA: Indoor-outdoor Unit
Combination Fault
UO: Refrigerant
Shortage
U2: Drop Voltage Or
Main Circuit Overvoltage
U4: Failure Of
Transmission (Between Indoor Unit And Outdoor Unit)
A1: Indoor Pcb
Defectiveness
A5: High Pressure
Control Or Freeze-up Protector
A6: Fan Motor Fault
C4: Faulty Heat
Exchanger Temperature Sensor
C9: Faulty Suction Air
Temperature Sensor
EA: Cooling-heating
Switching Error
E1: Circuit Board Fault
E5: Ol Started
E6: Faulty Compressor
Start Up
E7: Dc Fan Motor Fault
E8: Overcurrent Input
F3: High Temperature
Discharge Ppe Control
F6: High Pressrue
Control (In Cooling)
H0: Sensor Fault
H6: Operation Fault Due
To Faulty Position Detection Sensor
H8: Dc Current Sensor
Fault
H9: Faulty Suction Air
Temperature Sensor
J3: Faulty Discharge
Pipe Temperature Sensor
J6: Faulty Heat
Exchanger Temperature Sensor
L3: Electrical Parts
Heat Fault
L4: High Temperature At
Inverter Circuit Heatsink
L5: Output Overcurrent
P4: Faulty Inverter
Circuit Heatsink Temperature Sensor
Error Diagnosis
by Wired Controller (MC301):
McQuay
Air Conditioner Remote Control Error Codes
E0: System malfunction
E1: Sensor Broken (TH1
discharge Temp.)
E2: Sensor Broken (TH2
inlet coil 1#)
E3: Sensor Broken (TH3
mid coil 1#)
E4: Sensor Broken (TH4
inlet coil 2#)
E5: Sensor Broken (TH5
mid coil 2#)
E6: Sensor Broken (TH6
inlet coil 3#)
E7: Sensor Broken (TH7
mid coil 3#)
E8: Sensor Broken (TH8
ambient temp)
E9: Sensor Broken (TH9
outlet coil)
EA: Sensor Broken (TH10
subcool outlet)
EB: Sensor Broken (TH11
subcool suction)
EC: Sensor Broken (TH12
suction)
EF: Emergency Run
F0: Outdoor Storage
Malfunction
F1: Sensor Broken
(indoor inlet coil)
F2: Sensor Broken
(indoor mid coil)
F3: Sensor Broken
(indoor outlet coil)
F4: Sensor Broken
(indoor return air)
F5: Sensor Broken
(indoor supply air)
F6: Indoor and
controller communication malfunction
F7: Ambient temp exceed
the limit
F8: 4WV malfunction
F9: Refrigerant leakage
FA: Controller storage
malfunction
FB: Water Pump (indoor
water pump)
FC: Indoor and outdoor
communication malfunction
FE: Outdoor master and
slave communication malfunction
H0: Digital comp overload
H1: Fixed Comp1
overload
H2: Fixed Comp2
overload
H3: Fixed Comp3
overload
H4: High pressure too
high
H5: Sensor broken, high
pressure
H6: Discharge temp too
high
L0: Super heat too low
L1: Low pressure too
low
L2: Sensor broken, low
pressure
10: System malfunction
11: Sensor broken
(slave TH1 discharge temp)
12: Sensor broken
(slave TH2 inlet coil 1#)
13: Sensor Broken
(slave TH3 mid coil 1#)
14: Sensor broken
(slave TH4 inlet coil 2#)
15: Sensor broken
(slave TH5 mid coil 2#)
16: Sensor broken (slave
TH6 inlet coil 3#)
17: Sensor broken
(slave TH7 mid coil 3#)
18: Sensor broken
(slave TH8 ambient temp)
19: Sensor broken
(slave TH9 outlet coil)
1A: Sensor broken
(slave TH10 subcool outlet)
1B: Sensor broken
(slave TH11 subcool suction)
1C: Sensor Broken
(slave TH12 suction)
1F: Emergency run
(slave)
20: Outdoor storage
(slave)
27: Ambient temp exceed the limit (slave)
