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Case Faults and Possible Solutions
No
Problem
Display Shows
ERR1
1
ERR2
ERR3
ERR4
ERR5
Display shows Err6 and the
2
cabinet lights are off
= Condenser Overheat Alarm
Display Shows Off
3
= Cabinet shut down due to
condenser overheat
Display shows off when
4
plugging in the cabinet after
changing the controller
Display shows 8888 or shows
5
nothing
Display shows radically other
value than 0...5º under normal
6
running conditions
Compressor Cut-in and Cut-
7
outs not following Set-value
(and the differential)
Parameter values not possible
8
to set as whole numbers
(e.eg. 1.0, 2.0, 3.0 and so on
Possible Cause
Probe Failure, Probe with the same
number broken or has a bad
connection
1 = Thermostat Probe
2 = Defrost Probe
3 = Cabinet Probe
4 = Condenser Overheat Probe
5 = Condenser Overheat Probe
Indicates dirty condenser or
condenser motor failure.
Condenser blocked or cabinet to
close to the wall
Indicates dirty condenser or fan motor
failure.
1) Parameter C2Pd in SEn folder set
wrong. Value should be 4 when
cabinet with 1 condenser (=4 probes).
NOTE! Off-text appears with 1-2 min
delay after starting up the cabinet.
2) Parameter Sdt (shut down delay) is
set to 0 min. NOTE! Off-text appears
directly after starting up the cabinet
3) Probe 4 or 5 broken or badly
connected. NOTE! Err 4 (or Err 5) text
appears directly after plugging in the
cabinet. Off-text appears with 1-2 min
delay
1)Start Failure
2) Display or display cord failure
3) Controller failure
NOTE! Start failure fixed in NRC-
100 with software version C1.0 or
later (manuf. date 15/08 or later)
1) Cabinet set too cold
2) Other probe than cabinet
temperature probe (e.g. 3) showing
on the display
3) Probes incorrectly connected
Cabinet running on minimum running
time(Lon) and minimum stop time
(CoFF)
Controller malfunction
8
Solution
Check connection or change
probe.
Check / Clean condenser
Change fan motor
Check for sufficient clearance at
rear of machine
Check Condenser cleanliness
Check condenser fan motor and
refrigerant circuit function
1) Change parameter C2Pd to 4
2) Change parameter Sdt to 1
3) Change probe/s 4 or 5. Check
connection
1) Disconnect the cabinet and
plug in again.
2) Change display or display cord
3) Change controller
1) Change St1 value
2) Check parameter dlSP (cabinet
temperature = 3)
3) Check connections
If the cabinet temperature is OK
there is no need for service.
If the products is too cold raise
the set value, and if necessary
increase the differential
Change controller
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