mCq pCO - Standard + Heat Pump - McQuay
mCq pCO - Standard + Heat Pump - McQuay mCq pCO - Standard + Heat Pump - McQuay
Conditioning: pCO Standard chiller + heat pump User Guide ver. 2.9 02/11/99Mounting pCO optional cardsClock cardThe clock card is necessary to display the current time and date and to perform a time-zonecontrol action.Connect it to connector no. 3 shown in the figure onpage 7.In the event of power supply failure to pCO, the clockcard will be powered by a rechargable lithium battery(45 mA/h, min. operating time = one month).MNEWCLOCK0CodeOptoisolated RS422 serial cardThe RS422 serial card allows pCO to be networkconnected into local or remote supervisory andtelemaintenance systems.Connect this card to the relative connector (4) shownon page 7.PCOSER0000CodeConnection to a 80-column serial printer: electrical diagram.connettore9 poli - femminapCORXTXGNDData Terminal ReadyClear to SendData Set ReadyCarrier Detect235486123768205connettore25 poli - maschiostampanteMounting the EpromThe Eprom must be inserted into the main card.An arrow on the label of the eprom indicates how to insert it correctly.When inserting the eprom into its socket payattention to align its polarity correctly (the notch onthe eprom must coincide with that of the socket).Insert the eprom carefully without bending orbreaking its small pins.Pag.10/61
Conditioning: pCO Standard chiller + heat pump User Guide ver. 2.9 02/11/99Before requesting ServiceTHE UNIT DOES NOT STARTLed of the Enter key off, Lcd off, other led indicators off.Cause:a. no mains voltageb. transformer (220 - 24V) is not powered with 24 Vacc. 24V power supply connector is not well plugged-inTHE UNIT IS ON BUT:the alarm led indicator is ONthe LCD shows no messages or random messagesthe buzzer soundsCause:a. eprom inserted with wrong polarityb. pins of the eprom bentc. microprocessor chip damaged: contact qualified service personneld: telephone cable from terminal to main card is not correctly connectedWRONG INPUT SIGNALS READINGCause:a. incorrect probe connectionsb. probes' wires must be placed far from electrical noises (power cables, contactors, hightension cables, etc.)c. incorrect connection between interfaces and controller (flat cables)d. incorrect power source to interfacesFAULTY EEPROMa. contact qualified service personnelpCO TURNS OFF AND ON REPEATEDLY (WATCH-DOG) OR IT OPERATES SOME(DIGITAL AND/OR ANALOGUE) OUTPUTS AT RANDOM.Cause:a. incorrect power supplyb. power cables are too close to the microprocessors of the interfaces and to the controlcard.Inputs / OutputsAnalogue inputsPag.11/61
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Conditioning: <strong>pCO</strong> <strong>Standard</strong> chiller + heat pump User Guide ver. 2.9 02/11/99Mounting <strong>pCO</strong> optional cardsClock cardThe clock card is necessary to display the current time and date and to perform a time-zonecontrol action.Connect it to connector no. 3 shown in the figure onpage 7.In the event of power supply failure to <strong>pCO</strong>, the clockcard will be powered by a rechargable lithium battery(45 mA/h, min. operating time = one month).MNEWCLOCK0CodeOptoisolated RS422 serial cardThe RS422 serial card allows <strong>pCO</strong> to be networkconnected into local or remote supervisory andtelemaintenance systems.Connect this card to the relative connector (4) shownon page 7.PCOSER0000CodeConnection to a 80-column serial printer: electrical diagram.connettore9 poli - femmina<strong>pCO</strong>RXTXGNDData Terminal ReadyClear to SendData Set ReadyCarrier Detect235486123768205connettore25 poli - maschiostampanteMounting the EpromThe Eprom must be inserted into the main card.An arrow on the label of the eprom indicates how to insert it correctly.When inserting the eprom into its socket payattention to align its polarity correctly (the notch onthe eprom must coincide with that of the socket).Insert the eprom carefully without bending orbreaking its small pins.Pag.10/61
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