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5.Controlling and Operation
5.4 Interface diagram
(1) Wire control interface diagram and definition
Protection/fault
Codes
Causes
Removal methods
Fan 1 Running IPM Prot.
Fan 1 Overcurrent Prot.
Fan 1 Over-Temp Prot.
Fan 1 Bus Over Voltage Prot.
Fan 1 Bus Under Voltage Prot.
Fan 2 Output Phase Loss Prot.
Fan 2 Output Zero Speed Prot.
Fan 2 Start IPM Prot.
Fan 2 Running IPM Prot.
Fan 2 Overcurrent Prot.
Fan 2 Over-Temp Prot.
Fan 2 Bus Over Voltage Prot.
Fan 2 Bus Under Voltage Prot.
Abnormal Power Fault
Syst1: High Suction Temp Prot.
Syst2: High Suction Temp Prot.
Syst1: High Suction Temp Prot. 3+
Syst2: High Suction Temp Prot. 3+
System 1 fan running current is too large
System 1 fan running current is too large
System 1 fan drive board has poor heat dissipation
Voltage is too high
Voltage is too low
System 2 fan failed to start
System 2 fan failed to start
System 2 fan starting current is too large
System 2 fan running current is too large
System 2 fan running current is too large
System 2 fan drive board has poor heat dissipation
Voltage is too high
Voltage is too low
SYS1 return air temperature is too high
SYS2 return air temperature is too high
SYS1 return air temperature is too high
SYS2 return air temperature is too high
F104
F105
F106
F107
F108
F201
F202
F203
F204
F205
F206
F207
F208
EE1
E077
E078
E077
E078
Check if the system 1 fan rotor is locked
Check if the system 1 fan rotor is locked
Check the heat dissipation condition
Check if the input voltage is higher than 480V
Check if the input voltage is lower than 250V
Check if the system 2 fan line is normal
Check if the system 2 fan rotor is locked
Check if the system 2 fan rotor is locked
Check if the system 2 fan rotor is locked
Check if the system 2 fan rotor is locked
Check the heat dissipation condition
Check if the input voltage is higher than 480V
Check if the input voltage is lower than 250V
Check if the return air temperature sensor is normal
Check if the return air temperature value is
greater than the protection value
Check if the return air temperature sensor is normal
Check if the return air temperature value is
greater than the protection value
V
T
A
B
G
R
Sign
V
R
T
A
B
G
Meaning
12V (power+)
No use
No use
485A
485B
GND(power-)