Danfoss Optyma iCO2 Instructions Manual page 42

Instructions
14.3. When error stop occurred
1. Maintenance code (oPE code)
If conditions corresponding to each item are met, the maintenance code (oPE code) is displayed on the 7-segment display. For details of display, refer to
the following table.
7-segment display
oPE-3 Total compressor operation time since last maintenance > 30,000 h
Number of the error detection stops within 60 min. after first stop
oPE-11
[Low pressure error count (load side stop)] = 120 times
oPE-30 Active filter error detection
oPE-88 Compressor oil shortage detection
2. Error code
If the unit is stopped fully by error, the code corresponding to error content is displayed on the 7-segment display. For details of display, refer to the
following table.
7-segment Protective device
Display symbol
Power supply
phase loss
E32
Power supply
reverse phase
Discharge pipe
E36-1
temp. error
Gas cooler temp.
E37-1
sensor No.1 error
Gas cooler temp.
E37-2
sensor No.2 error
Middle pressure
E37-3 receiver inlet
temp. sensor error
Injection inlet
E37-4
temp. sensor error
Subcooling coil
E37-6
temp. sensor error
Liquid feed pipe
E37-7
temp. sensor error
Outdoor air temp.
E38
sensor error
Discharge pipe
E39-1
temp. error
63H
High pressure
E40
switch
Power transistor
E41-1 overheat
(5 times in 1 hour)
E42-1 Current cut
E43-1 Liquid return error
42 | AN405821998738en-000102 - 118A5495A
Item
Cause
Phase loss (incl. under-voltage)
Power supply reverse phase
Refrigerant gas shortage
Liquid bypass circuit failure
Gas cooler temp. sensor blown wire,
short-circuit are detected
Middle pressure receiver inlet temp.
sensor blown wire, short-circuit are
detected
Injection inlet temp. sensor blown wire,
short-circuit are detected
Subcooling coil temp. sensor blown wire,
short-circuit are detected
Liquid feed pipe temp. sensor blown
wire, short-circuit are detected
Out door air temp. sensor blown wire,
short-circuit are detected
Discharge pipe temp. sensor blown wire,
short-circuit are detected
Less air passing through gas cooler
Low compressor speed
Under overload state
Clogged high pressure side refrigerant
pipe
Overheat of power transistor
Stops with power transistor sensor
blown wire, output error detection
Detect the anomalous output current of
inverter
Defect the anomalous under dome
temp.
Synchronized with simplified remote monitor trigger
timing
Synchronized with simplified remote monitor trigger
timing
When it is not set at E63 display
Oil level error is valid when SW6-5 and SW6-7 are OFF
Inspection
Volt check at 3-phase
See "2. Prevention of reverse phase operation" and change connection
Flash gas generation or no in sight glass
Defective electronic expansion valve
Defective gas cooler temp. sensor,
connector disconnection or short-circuit
Defective middle pressure receiver inlet
temp. sensor, connector disconnection or
short-circuit
Defective injection inlet temp. sensor,
connector disconnection or short-circuit
Defective subcooling coil temp. sensor,
connector disconnection or short-circuit
Defective liquid feed pipe temp. sensor,
connector disconnection or short-circuit
Defective outdoor air temp. sensor,
connector disconnection or short-circuit
Defective discharge pipe sensor,
connector disconnection or short-circuit
Much dust on gas cooler
Clogged gas cooler suction inlet, blow
outlet
Fan speed controller failure
High gas cooler suction air temp.
High suction gas pressure (low pressure)
Defective oil separator outlet check valve Replace
Check the operation of the transistor
cooring fan
Defective power transistor sensor,
connector disconnection or short-circuit
Check the inverter output
Compressor wiring, connector
disconnection or short-circuit
Check the specification of connected low
pressure devices
Under dome temp. sensor, connector
disconnection or short-circuit
© Danfoss | Climate Solutions | 2023.02 | LCA012A024
Remark
Measures / countermeasures
Security of correct connection,
power supply voltage
Additional refrigerant charge
Replace
Replace
Replace
Replace
Replace
Replace
Replace
Replace
Wash, remove
Remove
Replace parts
Repair short-circuit
Adjust as specified
Replace power transistor
cooling fan or power transistor
Replace power transistor sensor
Replace inverter or compressor
Replace wiring or power
transistor
Connect the adequate low
pressure devices
Replace