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Instructions
7-segment
Protective device
Display
symbol
Inverter-PCB
E45-1
transmission error
(CM1)
DC fan motor
E48-1
No.1 error
DC fan motor
E48-2
No.2 error
Low pressure
E49
error
Power transistor
overheat
E51-1
(continue for 15
min.)
Suction pipe
E53
temp. sensor error
Low pressure
E54-1
sensor error
High pressure
E54-2
sensor error
Under dome
E55-1
temp. sensor error
Power transistor
E56-1
temp. sensor error
Rotor position
E58-1
detection error
Compressor
E59-1
startup failure
Middle pressure
E60
sensor error
External input
E63
error stop
Oil level sensor
E88-1
error
Communication
error between
E89
CPU of control
PCB
• 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.
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.
© Danfoss | Climate Solutions | 2023.02 | LCA012A024
Cause
Loose, blown, wrong wiring between
condensing unit-controller
Defective PCB
(Condensing unit PCB)
Low fan speed is detected
Low pressure is detected
Overheat of power transistor
Stops with power transistor sensor
blown wire, output error detection
Suction pipe temp. sensor blown wire,
short-circuit are detected
Stops with low pressure sensor blown
wire, output error detection
Stops with high pressure sensor blown
wire, output error detection
Under dome temp. sensor blown wire,
short-circuit are detected
Power transistor temp. sensor blown
wire, short-circuit are detected
Detection of the compressor rotor
position.
Compressor fails to startup.
Stops with medium pressure sensor
blown wire, output error detection
Stops with the external input
The oil level of compressor is not
adequate
Communication between CPU is
detected
Inspection
Wiring conductivity check
Loose connection check
Wire connection No. check
PCB check
Defective DC fan motor, connector
disconnection or short-circuit
Leakage of refrigerant
Defective low pressure sensor, connector
disconnection or short-circuit
Check the operation of the transistor
cooling fan
Defective power transistor sensor,
connector disconnection or short-circuit
Suction pipe temp. sensor, connector
disconnection or short-circuit
Defective low pressure sensor, connector
disconnection or short-circuit
Defective high pressure sensor,
connector disconnection or short-circuit
Under dome temp. sensor, connector
disconnection or short-circuit
Power transistor temp. sensor, connector
disconnection or short-circuit
Check the inverter output
Compressor wiring, connector
disconnection or short-circuit
Check the inverter output
Compressor wiring, connector
disconnection or short-circuit
Defective medium pressure sensor,
connector disconnection or short-circuit
Check the connected devices
Check the quantity of oil with oil check
operetion
Check the wiring surround the CPU
118A5495A - AN405821998738en-000102 | 43
Measures / countermeasures
Replace wiring
Replace PCB
Replace DC fan motor or PCB
Repair the leakage
Replace low pressure sensor
Replace power transistor
cooling fan or power transistor
Replace power transistor
sensor
Replace
Replace
Replace
Replace
Replace
Replace inverter or compressor
Replace wiring or power
transistor
Replace inverter or compressor
Replace wiring or power
transistor
Replace
Replace wiring or repair the
connected devices
Additional refrigerant oil
charge
Repair wiring or replace PCB
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