Service manual

6-6
Alarm code Content Possible cause
E201 Pump-down does not end Injection solenoid valve does Wrong wiring
within 60 seconds. not close. Coil burned out
Coil fell out
Leakage of hot gas solenoid valve Valve blocked with contamination
Defrosting solenoid valve Valve blocked with contamination
Discharge gas by-pass solenoid valve Valve blocked with contamination
Low pressure sensor value is Printed-circuit board malfunction
abnormal Pressure sensor malfunction
E203 Overcool protection function Suction modulating valve does Lead wire breakage
actuate (control sensor ≤ not operate.
Wrong wiring
SP– 3.0) in the chilled ot partial Coil burned out
frozen mode for 3 minutes or Adopter PCB is defective
longer. Valve blocked with contamination
Insufficient evaporator fan air flow rate Air passage is blocked by foreign materials
(Only for partial frozen mode) Evaporator fan damaged
Air short circuit around evaporator
Evaporator fan motor thermal Evaporator fan interferes with guide
protector activates Lead wire breakage
Air passage is blocked by foreign material
E207 Defrosting time is 90 minutes Evaporator outlet sensor gets off from the evaporator outlet tube.
long Insulation pipe cover of evaporator outlet sensor is improperly installed.
Evaporator outlet sensor is defective.
Defrosting solenoid valve does Lead wire breakage
not open Coil burned out
Valve blocked with contamination
Hot gas solenoid valve does Lead wire breakage
not open. Coil burned out
Valve blocked with contamination
Injection solenoid valve does Lead wire breakage
not open Wrong wiring
Coil burned out
Coil fell out
Valve blocked with contamination
High-pressure transducer or low-pressure transducer malfunction.
Evaporator outlet sensor value Printed-circuit board malfunction
is abnormal Sensor malfunction
Excessive frosting
E303 Humidity setting request
E305 Defrosting interval setting request
CPU board (SRAM) malfunction
Resetting
E307 Calendar setting request
E311 Trip start setting request
E401 Supply air temperature sensor Line breakage
(SS) malfunction Short circuit
Wrong wiring
Sensor value is abnormal Printed-circuit board malfunction
E402 Data recorder supply air Line breakage
temperature sensor (DSS) Short circuit
malfunction Wrong wiring
Sensor value is abnormal Printed-circuit board malfunction
E403 Return air temperature sensor Line breakage
(RS) malfunction Short circuit
Wrong wiring
CPU board malfunction
E404 Data recorder return air Line breakage
temperature sensor (DRS) Short circuit
malfunction Wrong wiring
CPU board malfunction
E405 Discharge temperature sensor Line breakage
(DCHS) malfunction Short circuit
Wrong wiring
CPU board malfunction
E406 Suction gas sensor (SGS) Line breakage
malfunction Short circuit
Wrong wiring
CPU board malfunction