Datacolor CONDITIONER™ (MB2) 06/2017
page 118/126
22. Troubleshooting
Fault description
Possible cause
Required measures
General
Cabinet without function.
No power supply.
Check connection to power sup-
ply.
Wrong voltage.
Check power supply for correct
voltage (chap. 4.7).
Cabinet fuse has responded.
Check cabinet fuse and replace it
if appropriate. If it responds
again, contact your local Data-
color service representative.
Controller defective.
Contact your local Datacolor ser-
vice representative.
Nominal temperature exceeded
by 10° due to cabinet failure.
Over temperature protective de-
vice (class 1) responds.
Heating
Cabinet heating permanently,
set-point not maintained.
Controller defective.
Contact your local Datacolor ser-
vice representative.
Semiconductor relay defective.
Controller not well adjusted, or
adjustment interval exceeded.
Calibrate and adjust controller.
Cabinet doesn’t heat up.
Pt 100 sensor defective.
Contact your local Datacolor ser-
vice representative.
Heating element defective.
Semiconductor relay defective
Cabinet doesn’t heat up when
turned on.
Safety controller responds.
Inner chamber temperature has
reached the safety controller
setpoint. Safety controller set too
low.
Acknowledge the alarm on the
controller. Check temperature
setpoint setting. If appropriate,
select suitable safety controller
setpoint (chap. 12.2).
Safety controller (chap. 12.2)
defective.
Contact your local Datacolor ser-
vice representative.
Refrigerating performance
Low or no refrigerating perfor-
mance.
Ambient temperature > 25 °C /
77
°F
(chap.3.4).
Select cooler place of installation.
Combination of tempera-
ture/humidity values not in the
optimum range (see temperature
humidity diagram, Figure 20).
Select combination of tempera-
ture/humidity values in the opti-
mum range (chap. 17).
Compressor not turned on.
Contact your local Datacolor ser-
vice representative.
Electro-valves defective.
No or not enough refrigerant.
Too much external heat load.
Reduce heat load.
Humidity
Humidity fluctuation:
Control accuracy of
±
3 % r.F. is
not reached.
Door gasket defective.
Replace door gasket.
Door opened very frequently.
Open doors less frequently.
Humidity fluctuation, together
with temperature fluctuation > 1
°C with a set-point ca. 3 °C above
ambient temperature.
Place of installation too hot.
Select cooler place of installation
or contact your local Datacolor
service representative.
Low or no dehumidification.
Capillary tube blocked
Contact your local Datacolor ser-
vice representative.
Not enough refrigerant.
Humidity control turned off.
