Power frequency error 2
Branch Box Controller PCB
Outdoor unit Main PCB
Outdoor Filter PCB
Outdoor Unit : E. 11. 3 or E. 11. 4
Error Code : 11
Trouble shooting 39
Indicate or Display:
Detective Actuators:
Detective details:
Branch Box Error Method:
Forecast of Cause :
When 4 continuous failures occurred at Power frequency test.
( Branch Box (Primary) : Power supply for communication to outdoor unit.
Branch Box (Secondary) : Power supply for communication to
primary branch box.)
1. Connection failure 2. External cause 3. Controller PCB failure 4. Outdoor Main PCB failure
5. Outdoor Filter PCB failure
YES
NO
OK
Check Point 1-1 : Reset the power supply and operate
Does error indication reappear?
Check Point 2 : Check connection
Check Cable/Breaker.
Check loose or removed connection.
>> If there is an abnormal condition, correct it by
referring to Installation Manual or Design &
Technical Manual.
Check Point 1-2 : Check external cause such as noise
Check if the ground connection is proper.
Check if there is any equipment that causes harmonic wave
near the power cable (Neon light bulb or any electronic
equipment which causes harmonic wave).
Check Point 3 : Check the voltage of power supply
Check the voltage of power supply
[Primary branch box]
>> Check if AC198V(AC220V-10%) - 264V(AC240V+10%) appears
at Branch box terminal "Outdoor unit" 1 - 2 (CN105).
[Secondary branch box]
>> Check if AC198V(AC220V-10%) - 264V(AC240V+10%) appears
at Branch box terminal "Branch box" 1 - 2 (CN105).
If the voltage does not appear, replace Outdoor Filter PCB.
If the voltage does not appear, replace Branch box controller PCB
AC
Indoor Unit : Operation LED 1times Flash, Timer LED 1times Flash,
Economy LED Flashing (0.1s ON / 0.1s OFF)
Branch Box : LED401/ 402/ 403 Lit, LED404 Unlit, LED405 Lit
02-55
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