Coil 2 (Expansion valve ) Error
OK
OK
OK
Indoor unit controller PCB
When the EEV2 drive circuit is open circuit
Check Point 2 : Check the connection of EEV2 connector
Check if the wire of EEV2 has damege or not
(Slash, Braking of wire, Pinching, etc. )
Check Point 5 : Check the output of EEV2 on the Main PCB
Check Point 3 : Check the EEV2 wire
Check If the connector CN 11 is lose connection wrong wiring or not
Indoor Unit : Operation LED 5 times Flash, Timer LED 2 Times Flash,
Filter LED Continuous Flash.
Outdoor Unit : E.5U.1
Error Code : 5 2
Check Point 1 : Check if the capacity setting was wrong.
Check if the capacity setting of transmission PCB was not selected
as 40kW or 50kW by using of one EEV unit.
<Refer to the installation manual>
1. Wrong capacity setting 2. EEV2 coil lose connection 3. EEV2 wire(s) cut or pinched
4. Defective EEV2 coil 5. Controller PCB (DC 12V) output abnormal
6. Noise momentary open, voltage drop
Trouble shooting 85 E52. 2
Indicate or Display:
Detective Actuators: Detective details:
INDOOR UNIT Error Method:
Forecast of Cause :
Check if the DC12V is on between the pin No.1 of CN11 and
Pin No.6 of CNB01 (GND)
(Disconnect the wire of EEV2 when you check the output of EEV2 )
OK
Check if the circuit of EEV coil winding is good or not
(Refer to the service parts Information 13 )
Check Point 4 : Check the EEV2 Coil
Check Point 6 : Noise, momentary open, voltage drop
Check if temporary voltage drop was not generated.
Check if momentary open was not generated.
Check if ground is connection correctly
or there are no related cables near the power line.
OK
Replace EEV2 coil
NG
Replace EEV2 coil
NG
Replace Min PCB
NG
04-94
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