5.7
Compressor
MPXone features the following compressor protection parameters.
Code Description Def Min Max UOM User
User
terminal
d9
Defrost priority over compressor protection times
0/1 = protection times observed/protection times not
observed
1 0 1 - M NO
c0 Delay to enable solenoid/comp. and evap. fans on power-up 0 0 240 min M NO
c1 Min time between consecutive compressor starts 0 0 15 min M NO
c2 Min compressor OFF time 0 0 15 min M NO
c3 Min compressor ON time 0 0 15 min M NO
l c0 is used to delay the start of control when the device is powered on. This is useful in the event of
power failures, so that the controllers (in the network) don’t all start at the same time, avoiding
potential problems of electrical overload. In models with Carel electronic expansion valve and
Ultracap technology, this parameter must be set to a value greater than 2.
l c1 sets the minimum time between two successive starts of the compressor, irrespective of the
request. This parameter can be used to limit the maximum number of starts per hour;
l c2 sets the minimum compressor off time. The compressor will not be started again until the
minimum time set has elapsed;
l c3 sets the minimum compressor running time;
l d9 disables the compressor protection times when defrosting (useful for hot gas defrosts):
l d9 = 0: protection times are observed;
l d9 = 1: protection times are ignored, defrosting has higher priority.
Fig.5.ag
Ref. Description
t Time
Ref. Description
CMP Compressor
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