Danfoss Optyma iCO2, Instructions Manual, Page: 43 / 68

Instructions
118A5495A - AN405821998738en-000102 | 43 © Danfoss | Climate Solutions | 2023.02 | LCA012A024
• Method of error inspection reset
If any error occurred, reset it as follows.
1. Remove the cause of error.
2. Adjust the 7-segment display at “P20” with SW8, SW9, and press SW7 for more than 3 seconds.
3. Change from “0” to “1” with SW8.
The error will be reset.
Make sure, however, to check the error code and remove the cause of error before resetting.
* Error cannot be reset for 3 minutes after it occurred.
7-segment
Display
Protective device
symbol
Cause Inspection Measures / countermeasures
E45-1
Inverter-PCB
transmission error
(CM1)
Loose, blown, wrong wiring between
condensing unit-controller
Wiring conductivity check
Loose connection check
Wire connection No. check
Replace wiring
Defective PCB
(Condensing unit PCB)
PCB check Replace PCB
E48-1
DC fan motor
No.1 error
Low fan speed is detected
Defective DC fan motor, connector
disconnection or short-circuit
Replace DC fan motor or PCB
E48-2
DC fan motor
No.2 error
E49
Low pressure
error
Low pressure is detected
Leakage of refrigerant Repair the leakage
Defective low pressure sensor, connector
disconnection or short-circuit
Replace low pressure sensor
E51-1
Power transistor
overheat
(continue for 15
min.)
Overheat of power transistor
Check the operation of the transistor
cooling fan Replace power transistor
cooling fan or power transistor
Stops with power transistor sensor
blown wire, output error detection Defective power transistor sensor,
connector disconnection or short-circuit Replace power transistor
sensor
E53
Suction pipe
temp. sensor error Suction pipe temp. sensor blown wire,
short-circuit are detected Suction pipe temp. sensor, connector
disconnection or short-circuit
Replace
E54-1
Low pressure
sensor error Stops with low pressure sensor blown
wire, output error detection Defective low pressure sensor, connector
disconnection or short-circuit
Replace
E54-2
High pressure
sensor error Stops with high pressure sensor blown
wire, output error detection Defective high pressure sensor,
connector disconnection or short-circuit
Replace
E55-1
Under dome
temp. sensor error Under dome temp. sensor blown wire,
short-circuit are detected Under dome temp. sensor, connector
disconnection or short-circuit
Replace
E56-1
Power transistor
temp. sensor error Power transistor temp. sensor blown
wire, short-circuit are detected Power transistor temp. sensor, connector
disconnection or short-circuit
Replace
E58-1
Rotor position
detection error Detection of the compressor rotor
position.
Check the inverter output Replace inverter or compressor
Compressor wiring, connector
disconnection or short-circuit Replace wiring or power
transistor
E59-1
Compressor
startup failure
Compressor fails to startup.
Check the inverter output Replace inverter or compressor
Compressor wiring, connector
disconnection or short-circuit Replace wiring or power
transistor
E60
Middle pressure
sensor error Stops with medium pressure sensor
blown wire, output error detection Defective medium pressure sensor,
connector disconnection or short-circuit
Replace
E63
External input
error stop
Stops with the external input Check the connected devices
Replace wiring or repair the
connected devices
E88-1
Oil level sensor
error The oil level of compressor is not
adequate Check the quantity of oil with oil check
operetion Additional refrigerant oil
charge
E89
Communication
error between
CPU of control
PCB
Communication between CPU is
detected
Check the wiring surround the CPU Repair wiring or replace PCB
15 – Declaration of incorporation
•
Pressure Equipment Directive 2014/68/EU
EN 378-2:2016
- Refrigerating systems and Heat Pumps - Safety and environmental requirements-Parts 2: Design, construction, testing, marking and documen-
tation.
Low Voltage Directive 2014/35/EU
EN 60335-1:2012 + A11:2014- Household and similar electrical appliances-Safety-Part 1: General requirements-for all above
mentioned condensing units
Eco-design DIRECTIVE 2009/125/ EC
, establishing a framework for the setting of Eco-design requirements for energy-related
products.
REGULATION (EU) 2015/1095, implementing Eco-design Directive 2009/125/EC with regard to Eco-design requirements for professional refrigerated storage
cabinets, blast cabinets, condensing units and process Chiller.
• Condensing unit measurements are made according to standard “EN 13771-2:2017” – Compressor and condensing units for refrigeration-performance testing
and test methods- part 2: Condensing units.