Carrier 42UQV050M Service Manual

Also see for 38UYV050M Series: Owner's manual Installation manual

Contents

– 64 –11-1. First Confirmation11-1-1. Confirmation of Power SupplyConfirm that the power breaker operates (ON) normally.11-1-2. Confirmation of Power VoltageConfirm that power voltage is AC 220–230–240 ± 10%.If power voltage is not in this range, the unit may not operate normally.11-1-3. Operation Which is not a Trouble (Program Operation)For controlling the air conditioner, the program operations are built in the microcomputer as described in thefollowing table.If a claim is made for running operation, check whether or not it meets to the contents in the following table.When it does, we inform you that it is not trouble of equipment, but it is indispensable for controlling andmaintaining of air conditioner.Table 11-1-1No.123456Operation of air conditionerWhen power breaker is turned “ON”, theoperation indicator (Green) of the indoorunit flashes.Compressor may not operate even if theroom temperature is within range ofcompressor-ON.In Dry and ECO mode, FAN (air flow)display does not change even though FAN(air flow select) button is operated.Increasing of compressor motor speedstops approx. 30 seconds after operationstarted, and then compressor motor speedincreases again approx. 30 seconds after.In AUTO mode, the operation mode ischanged.In HEAT mode, the compressor motorspeed does not increase up to the maxi-mum speed or decreases before thetemperature arrives at the set temperature.DescriptionThe OPERATION lamp of the indoor unit flashes when powersource is turned on. If [ ] button is operatedonce, flashing stops. (Flashes also in power failure)The compressor does not operate while compressor restartdelay timer (3-minutes timer) operates.The same phenomenon is found after power source hasbeen turned on because 3-minutes timer operates.The air flow indication is fixed to [AUTO].For smooth operation of the compressor, the compressormotor speed is restricted to Max. 41 rps for 2 minutes, andMax.91 rps for 2 minutes to 3 minutes, respectively after theoperation has started.After selecting Cool or Heat mode, select an operation modeagain if the compressor keeps stop status for 15 minutes.The compressor motor speed may decrease by hightemp.release control (Release protective operation by temp.-up ofthe indoor heat exchanger) or current release control.FILE NO. SVM-13035