DMC20- The “alarm in
progress” led is on.
One of the following appears on the upper line of the DMC20 display :
1. "Protection Comp." : The electric protection (see Q1 on the electric diagram) of the compressor is
activated - restore it and retry.
2. "Protection Comp." : The safety thermo-switch T
S
has been activated - see specific point.
3. "Protection Fan": (Air-Cooled) : Intervention of the electric protection (see Q2 on the electric
diagram) of the fan - restore it and check the proper operation of the dryer
4. "Protection Fan": (Air-Cooled) : Intervention of the thermal protection (see TV on the electric
diagram) inside the fan - wait 30 minutes and retry.
5. “STOP Compr. LP” : The P
B
low pressure-switch is activated - see specific point.
6. “STOP Compr. HP” : The P
A
low pressure-switch is activated - see specific point.
7. “Condens. HIGH” : condensing temperature is too high - see specific point.
8. “LOW DewPoint” : The DewPoint is too low - see specific point.
9. “HIGH DewPoint” : The DewPoint is too high - see specific point.
10.“Probe Fault” : one of the probes is faulty - see specific point.
DMC20- The
condensing
temperature is too
high.
Check which of the following has caused the alarm :
1. The ambient temperature is too high or the room aeration is insufficient - provide proper
ventilation (Air-Cooled).
2. The condenser is dirty - clean it (Air-Cooled).
3. The condenser fan doesn’t work - see specific point (Air-Cooled).
4. The cooling water is too hot - restore the nominal condition (Water-Cooled).
5. The cooling water flow is insufficient - restore the nominal condition (Water-Cooled).
DMC20- DMC20
display “Probe Fault”
message.
One of the temperature probes is faulty - display in sequence all the temperatures - the
parameter indicated with “?” corresponds to faulty probe.
Verify that the probe-extension connector of faulty probe is correctly inserted in DMC20.
Check the probe-extension connection between DMC20 and terminal board.
Check electric connection between probe and terminal board.
If the fault persists, replace probe and/or probe-extension.
NOTE: If any probe is faulty the dryer will run correctly even if there is an alarm condition.
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