INTARCON MCV-N - Troubleshooting: Temperature, Frost, and Condenser Alarms

intarblock | intartop
39
Syptom
Cause
Solution
The condenser fan
works inttermitently and
subsequently the
pressure switch turns off
the unit.
a) Condensation control is not working
properly (only for split units)
a) Compare
Pb3
value by checking with a
reliable thermometer, check probe isolation,
replace probe and isolate it properly. Check
HP and LP values performance during starting
up, stop fan and modify ALH and AL2
parameters if neccesary
Evaporator fan does not
work.
Blocked evaporator
(frost)
a) LED ON and power in board connectors
à
faulty electrical supply connection or faulty
motorfan
B) LED off à wrong Pb2 probe value à
faulty probe or wrong probe wiring
a)
Check electrical conexión or c
hange
motorfan.
b) Check probe wiring or replace probe
Noisy compressor
a) Loose compressor
b) Low oil level
c) Faulty compressor
a) Check silentbloc screws
b) Add oil to the recommended level
c) Replace
Noisy unit
a) Unit is installed without noise insulation
a) Install insulating layer or supports under the
unit
Defrost mode doesn’t
work
a) Faulty heater or solenoid valve
b) Electrical fault.
c) Faulty evaporator probe
d) Wrong defrost parameters
e) Faulty solenoid valve (only for hot gas
defrosting units)
a) Repair or replace
b) check contactor and fuse
c) Check value Pb2, check connections,
replace
d) Check and adjust defrost parameters
e) Repair
P1
alarm and/or default
thermostat reading
Probe value is lower than cold room
temperature. The value decresases quickly
when the unit is operating
b) Room temperature probe faulty or wiring
faulty
a) wrong wiring between co
ld room
temperatura probe and evaporator probe
b) check probe wiring (electrical connection
between units for Split systems). Replace
probe
P2
alarm
a)
Evaporator probe faulty or wiring faulty
a) Check probe wiring (electrical interconexion
for split units). Replace probe
P3
alarm
a)
Condenser probe faulty
a)
Check probe wiring. Replace probe
dA
alarm
a)
open door micro
-
switch
a)
Check wiring and door switch or
electrical
bridge.
BAL
alarm and/or
EAL
alarm
a)
Misconfigured
board
and/or
board
defau
lt
a)
Check
board
configuration. Check
I2F=PAL
parameter value and/or replace board
The unit does not work
and the keyboard shows
the temperature value
and "---" alternatively
a)
Wrong voltage
a)
Check phase
connection
for three
-
phase
units