Troubleshooting - Porkka F Technical And Service Manual

Technical and Service manual
Inventus upright refrigerators and freezers

Troubleshooting

Probe alarm P1, P2 or P3
shown on the display
The unit gives "HA" or "LA"
temperature alarm
The fan signal LED in the
control device is not on and
the evaporator fan does
not rotate. It is also possible
that the display will show
"HA" alarm because of too
high a temperature inside
the cabinet (Note! Only in
models with probe P2)
The fan signal LED on the
control device is not on
and the evaporator fan
does not rotate. It is also
possible that the unit shows
"HA" alarm because of too
high temperature inside
the cabinet (Note! Only
models with door switch).
Porkka reserves the right to make product alterations at any time and can not be held responsible for any printing errors or omissions.
The probe cable has come off the card connectors
The probe cable is broken
The control probe P1 for the temperature inside the
cabinet does not function properly.
If the control probe P1 measures the temperature
incorrectly, the compressor could run for too long
periods, if the compressor signal LED is seen on the
display all the time. The fault may cause low
temperature alarm"LA".
T1 may also cause high temperature alarm "HA" when
the compressor does not start, or functions for too
short a period.
Measure the real temperature inside the cabinet with
a separate thermometer and compare with the
temperature display of the control unit. In case
there is a big difference, the P1 probe is probably
malfunctioning.
The evaporator probe P2 does not function properly.
Check the reading of probe P2 with the "Probe"
button and compare it to with the value of the Fst
parameter.
If the Fst has been adjusted to e.g. -5°C and the unit
feels cold but the "P2" reading is e.g. +10°C, the fault
is probably in the probe P2. The false temperature
data of the probe P2 prevents the evaporator fan
from starting.
The door switch does not function properly.
Leave the door ajar for 3 minutes. It the control
display shows "dA" "door open" alarm, the door
switch is OK. If there is no alarm, the door switch is
out of order.
You can also measure the functionality with a
multimeter of the card connectors.
16
Attach the cable to the
card connectors
Replace the probe
Replace the P1 probe
Replace the probe P2
Replace the switch.