Charging contacts 8. Earpiece TALK key also used to end a call Ringer switch Handset cradle 2. PAGE key 3. Wall mount 5. Language setting 1. Press TALK to end your call. Page Making A Call 2. Only one handset can talk with an outside caller at a time. The second handset cannot listen to the conversation or make an outgoing call while the other handset is in use.
Enter the telephone number. The number is displayed as you enter it. Press TALK. Changing the pre-dial number 1. Follow the voice instructions to complete your transaction. The LED on the base flashes to indicate there is a voice mail waiting. If you answer a call before the second ring the caller information may not be stored.
When the Caller ID list memory is full, a new call automatically replaces the oldest call in memory. Use the digit keys to enter the desired telephone number. The selected telephone number and name show on screen.
Chain dialing from the directory Use this feature to make calls that require a sequence of numbers such as using a calling card for a frequently called long distance number. Make sure the telephone is off before you replace the battery. For purchasing, servicing or replacement please contact our service center. Concord, Ont. L4K 5C7 www. Try replacing the battery. The battery may need to be charged. It stops flashing after the message has been reviewed. To maximize the battery performance, follow these guidelines: Charge it for a full 12 hours Before initial use of your new battery, charge it for 12 hours continuously.
The proper initial charging is very important to maximize the battery performance. The REN number of this phone is located on the bottom of the base unit. The termination on an interface may consist of any combination of device subject only to the requirement that Page 30 This symbol on the product is used to identify the following important information. Securely anchor the outdoor unit down with bolts and a metal frame.
Provide a suitable air baffle. Install the outdoor unit on a raised platform that is higher than drifting snow. Provide snow vents. Be careful not to allow contact of the refrigerant gas with a flame as this will cause the generation of poisonous gas.
Carefully refer to the wiring diagram and these instructions when wiring. Improper connections and inadequate grounding can cause accidental injury or death. Loose wiring may cause overheating at connection points and a possible fire hazard. Be careful when picking up and moving the indoor and outdoor units. Get a partner to help, and bend your knees when lifting to reduce strain on your back. Sharp edges or thin aluminum fins on the air conditioner can cut your fingers.
Escaped refrigerant gas, on contact with fire or heat, can produce dangerously toxic gas. If the gas comes in contact with a burning stove, gas water heater, electric room heater or other heat source, it can cause the generation of poisonous gas.
The room in which the air conditioner is to be installed requires a design that in the event of refrigerant gas leaking out, its density will not exceed a set limit. The refrigerant RA , which is used in the airconditioner, is safe, without the toxicity or combustibility of ammonia, and is not restricted by laws imposed to protect the ozone layer. However, since it contains more than air, it poses the risk of suffocation if its density should rise excessively.
Suffocation from leakage of refrigerant is almost non-existent. With the recent increase in the number of high density buildings, however, the installation of multi air conditioner systems is on the increase because of the need for effective use off loor space, individual control, energy conservation by curtailing heat and carrying power, etc. Most importantly, the multi air conditioner system is able to replenish a large amount of refrigerant compared to conventional individual air conditioners.
If a single unit of the multi air conditioner system is to be installed in a small room, select a suitable model and installation procedure so that if the refrigerant accidentally leaks out, its density does not reach the limit and in the event of an emergency, measures can be made before injury can occur.
For additional guidance and precautions related to refrigerant safety, please refer to the following documents:. Selecting Outdoor Unit for Operation. Compressor Control. Special Controls.
Other Controls. Operation of Solenoid Valves. Outdoor Fan Control. Demand Control. Rap Valve Kit Control. Discharge Temperature. Current Protection. Pressure Sensor Failure. Backup Operation. Service Maintenance Functions. Other Functions. Removing Panels. Removing Electrical Component Box and Duct. Discharging Compressor Oil. Recovering Refrigerant. Checking for Leakage After Repair.
Evacuating System. Charging Compressor Oil. Pumping Out Refrigerant from Outdoor Unit. High and Low Pressure Sensors. Replacing 4-way Valve. Ordinary Display Controls and Functions. Monitoring Operations. Outdoor Unit Alarm History Monitor. Mode Settings. Simple Settings Function.
Detailed Settings Function. Remote Controller Servicing Functions. Blinking Inspection Display on the Remote Controller. Inspection of Parts. Test Pin.
Thermister Characteristics Curve. The outdoor units all contain inverter compressors, and the system does not utilize the sub units that were used in earlier systems. The outdoor unit where the unit No. As a result, the system will not operate if no outdoor unit has been set as unit No.
This system can be expanded to connect a maximum of 3 outdoor units. The max. The CCU functions are disabled at all units except the unit that is set as unit No.
Therefore no problems will result even if the system address, No. However, making these settings may be convenient for manual backup operation, as it eliminates the necessity of making the settings again if unit No. Because in this system all outdoor units contain an inverter compressor, ordinarily there is no absolute order of priority for compressor operation. Therefore there is no order of priority for the outdoor units. However, it is possible to operate the outdoor units in sequence, beginning with unit No.
If it is necessary to operate the compressors simultaneously at multiple outdoor units, each outdoor unit will start, beginning with unit No.
At the time of factory shipment, delayed start for each system is not set to occur. Therefore when systems are linked and multiple systems are selected for start simultaneously by the central control device, all systems will begin operating simultaneously. For this reason, a function is included to delay the start time for each system address when systems are linked and multiple systems are selected for start by the central control device.
Those systems where this setting has been made will start after a delay according to their system addresses. When all outdoor units, or multiple outdoor units, must stop, the units stop at the same time. However, depending on the communications timing, a difference of approximately 10 seconds may occur. The last unit to stop operating is the outdoor unit that contains the inverter compressor with the shortest amount of operating time. In cooling mode, all inverter compressors in the outdoor units are designed to operate simultaneously.
Therefore, all the outdoor units will stop at a time when any one unit is stopped. In heating mode, the outdoor unit which has the inverter compressor with the shortest amount of operating time continues to run and rest of the other outdoor units may be stopped.
All the inverter compressors will stop at a time when the outdoor is stopped accordingly. Constant-speed compressors run in order of the shortest amount of operating time. In heating mode, the inverter compressor with the shortest amount of operating time runs at first followed by the compressors in order of the shortest amount of operating time including inverter units. First, the inverter compressor with the shortest amount of operating time is selected.
And then, the remained other compressors are selected and start in the order of shortest amount of operating time. The compressor operating conditions vary depending on the indoor unit operating conditions and the effects of indoor heat load, outdoor temperature and other factors. Unit No. Fine adjustments to system capacity control are made by the inverter compressors. Depending on the conditions, all inverter compressors may be operating for fine adjustment. These limits are set for each outdoor unit capacity.
For information about Quiet mode, refer to the field application functions. Refer to the Field Application Function for the detail. Once a compressor stops, it will not start for a period of 3 minutes 3-minute forced OFF. However, this does not apply when the compressor was forced to stop as the result of a control operation during the special controls start control, defrost control, refrigerant oil recovery control, etc. Evaporation temperature Te : Lowest heat exchanger temperature E1, E3 at any indoor unit.
Condensation temperature Tc : Highest temperature among the outdoor unit pressure sensor temperature and the heat exchanger temperatures E1 at all indoor units where the heating thermostat is ON.
Ordinarily, this is the outdoor unit pressure sensor temperature. If multiple outdoor units are connected, this is the highest outdoor unit pressure sensor temperature. Areas B and C are assumed to be area A for control purposes, instead.
By this reason, the compressor continues its operation regardless of the low evaporation temperature This is used for additional charging of refrigerant, test run checking etc. Vapor may be discharged if the test run continues for a long time. However, this does not indicate problems.
Subsequently if C area continues, the thermostat turns OFF. This is used for test run checks, etc. It may vary.
Protection control consists of 2 types of protection: discharge temperature protection and current protection. During operation when only a single outdoor unit is installed, the air discharge temperature level is determined the highest value is used , and the compressor capacity is limited, by using the air discharge temperature of the operating compressor as shown in the tables below. Air discharge temperature level: Highest level among the air discharge temperature levels of all compressors.
The values shown in the table above are reduced to the values calculated by roadmap control. Inverter compressor current control is composed of primary current control and secondary current control. Current protection control for the inverter compressor is performed by self-protection in the inverter circuit, and does not increase or decrease the compressor capacity.
When restarting after the trip stop occurs, the horsepower may increase slowly depending on the trip counter value. The trip counter will be cleared if no trip occurs within 10 minutes after operation starts. In addition to ordinary heating and cooling operation, this system also includes the following 3 types of special controls for control of the system as a whole. System refrigerant oil recovery control. When the microcomputer is initialized immediately after power-ON, after warning output, and all outdoor units are.
This control is intended to changeover the 4-way valve of outdoor unit. When the unit has been stopped for long. Valves at all indoor units operate at a fixed pulse according to the indoor unit capacity. Fan operates at the set fan speed or stops, depending on the indoor unit operation. This control is performed using the cooling cycle during cooling operation and using the heating cycle during heating operation.
When the oil level in an operating compressor is detected as 0 zero , the compressor stops in seconds. If this compressor repeats this operation 3 times and the oil level does not reach 2, system refrigerant oil recovery control is started. The counter for this compressor is not cleared unless the oil level for that compressor reaches 2, or else alarm output occurs. Refrigerant oil recovery control between systems shall be performed as the flow mentioned below. Normal operation 3-minute stop Refrigerant oil recovery control between systems Max.
Fan operates at the set fan speed, or stops depending on the operation mode of the. A Frost detection does not occur for 5 minutes after operation starts. B Frost is detected when either condition 1 or 2 below is met.
Condition 1: L2 line or below is detected twice, each time continuously for 4 minutes, when the compressor is operating. Condition 2: L1 line or below is detected for a total of 60 minutes when the compressor is operating. Even if the total time has not reached 35 minutes, if there is 1 or more outdoor units that fulfills the defrost detection conditions, all operating outdoor units perform defrost control at the same time.
If there is 1 outdoor unit and no thermal storage tank in a refrigerant system, a reverse cycle defrost will be carried out. Outdoor unit cycle defrost is performed in systems where 2 outdoor units are connected to the refrigerant system. With this defrost method, when 1 outdoor unit operates in defrost mode heat exchanger operating as a condenser , another outdoor unit operates as an evaporator in the same way as in ordinary heating mode. In this way, the other outdoor unit is heating the unit where defrost is occurring.
When 1 outdoor unit completes. Rather, because the heat source is very powerful, it is possible to shorten the defrost operating time. E C: Switching from evaporator operation to condenser operation. C E: Switching from condenser operation to evaporator operation.
However, if there is any other outdoor unit where the defrost end condition has not been met, defrost control continues for all outdoor units, and system defrost control is not ended. When all outdoor units where defrost control is in effect have met the defrost end conditions, defrost control is ended for the system.
At the time immediately after the oil level changes from 2 to 1, there is a specified amount of oil in the compressor. Namely, soon after the oil level is changed to 1, the oil in the compressor is not empty.
Check for any oil leakage as well as the refrigerant tubing. Excess oil in the compressor is sent by bypass via a capillary tube to the low-pressure circuit. The temperature detected by a temperature sensor is used to determine whether it is oil warm or refrigerant cold. However, if the oil level becomes 2, this control is stopped. Oil supply is performed for a maximum of 5 minutes from each unit.
In addition, oil supply is ended if the oil-receiving outdoor unit oil level changes to 2, or if the oil-supply outdoor unit oil level becomes low. The main purpose of this valve is to detect the flow of refrigerant refrigerant volume on the indoor-unit side when the outdoor unit heat exchanger is functioning as a condenser.
When the valve determines that there are signs of a low refrigerant level, refrigerant is supplied from the receiver tank to the system. This valve turns ON when symptoms of insufficient refrigerant gas occur at an indoor unit. Under these conditions the high pressure is low and refrigerant flow becomes poor. This valve turns OFF when symptoms of refrigerant overcharge are detected at the outdoor unit.
The RCV turns ON at stopped outdoor units when the heat exchanger at another outdoor unit is functioning as a condenser. The main purpose of this valve is to detect the flow of refrigerant refrigerant volume on the indoor-unit side when the outdoor unit heat exchanger is functioning as an evaporator. When the valve determines that there are signs of excess refrigerant, refrigerant is recovered at the receiver tank. It also turns ON in order to recover refrigerant at the outdoor unit after heating operation is stopped.
This valve is ON during heating operation and when it turns ON for the purpose of recovering refrigerant in the outdoor unit at the end of the heating operation. This valve turns ON when poor refrigerant flow at an indoor unit is detected, and when symptoms of overcharge are detected, if the heat exchanger at the outdoor unit is functioning as an evaporator.
A This valve turns ON when separator oil self-recovery control is in progress. C This valve is ON when control the system in case of insufficient refrigerant gas.
D This valve turns ON for 60 seconds after a constant-speed compressor starts. E This valve turns ON for seconds after defrost control ends. F This valve turns ON for 10 seconds after the outdoor unit stops. This valve flushes the oil from the balance tubes. In addition, it is used for recovering refrigerant from stopped outdoor units during cooling operation.
This valve is ON at the oil-supply outdoor unit when unit refrigerant oil recovery control is in progress. It is not constantly ON. If no indoor units have started even once after the power was turned ON, the outdoor unit electronic control valve operates at pulses. The configuration of heat exchangers is as shown in the figure below. MOV3 is excluded. Operation of Electronic Thermostatic Expansion Valve during normal unit operation. If any one compressor in the outdoor unit is operating, the outdoor heat exchanger coil is used.
In cooling operation, all the inverter compressors are designed to operate, therefore, all the outdoor heat exchangers in the outdoor units will be used. During heating mode SH operation in the heat exchanger 2 side, in order to prevent a liquid-back or high load operation from occurring a control may be implemented so that refrigerant may not flow intentionally to the heat exchanger. When SC is small and the length of the tubing connecting the indoor and outdoor units is long, the refrigerant flow in the indoor unit will be reduced significantly.
To prevent this trouble from occurring, MOV4 operates so as to increase supercooling in the double tube coil near the outlet of the outdoor unit. Refrigerant on the outer side evaporates, cooling the liquid refrigerant on the inner side. When the discharge temperature increases, the SC circuit electronic thermostatic expansion valve opens to pulses to cool down the compressor.
This operation takes priority over operation intended to increase SC. It is performed at top priority in all operating modes. In addition, the valve opening adjustment will be made when the discharge temperature falls.
These outdoor units utilize a DC fan motor that can be controlled in a maximum of 16 steps 16 modes. However, fan modes 15 and 16 can only be used if high static-pressure mode has been set. Outdoor air temp. For the first 30 seconds after operation starts, the mode is fixed at the initial mode which was calculated from the relationship between the outdoor air temperature and the outdoor unit horsepower. If the outdoor unit horsepower changes dramatically, say for about 2 hp, the initial mode may be recalculated and may be again fixed for 30 seconds.
After the fixed initial fan mode, the fan mode is increased or decreased according to the operating conditions. A Fan mode is increased when the high pressure satulation temperature sensed by the pressure sensor is high, and is decreased when the pressure sensor temperature is low. B The fan mode may be decreased when symptoms of insufficient refrigerant gas are detected at an indoor unit. A If the condensation temperature is low, the fan mode is increased at regular intervals.
B If the condensation temperature is high, the fan mode is decreased in order to prevent excessive loads. This control is intended to prevent snow from accumulating on stopped fans. Because the outdoor air temperature cannot be accurately detected when the unit is stopped, a higher outdoor air temperature is used for the control condition, in order to ensure correct operation.
Use a snowfall sensor as necessary according to the installation conditions. Because there is the possibility that the high pressure has increased, the fan operates in Max. For information about these settings, refer to the field application functions. The demand values can be set as needed with this device. For more information, refer to the field application functions. However, a decline in the required level may cause the SH target value to increase.
Be aware that in this case, the electronic control valve closes slightly. This can be easily identified incorrectly as insufficient gas. However, if installation is combined with except Type D, the high pressure saturated temp. A gas tube valve kit may be connected to the Type D indoor unit.
When the gas tube valve kit is connected, operations of gas tube valve kit and indoor unit electronic thermostatic expansion valve are as shown in the table. When the discharge tem-. If the same high discharge condition occurs. After a compressor has stopped, that compressor will not operate until the temperature has dropped to or. Occurs under the same conditions as P16 when the inverter compressor is operating.
Occurs when missing phase or overcurrent 48 A is detected at inverter compressor. The inverter current includes a primary current and secondary current. The alarm judgment utilizes both currents. Generally, the secondary current is larger that the primary current.
If the inverter compressor operating frequency is low, the current value is also low. Therefore this alarm is detected only when the compressor is stopped. The operating current of the constant-speed compressors is always higher than 1. Therefore, this alarm occurs as the result of an open circuit or failure. This system contains 2 types of pressure sensors: a high-pressure sensor and a low-pressure sensor. Alarms are emitted when the high-pressure sensor becomes an electrical open-circuit or a short-circuit conditions, and a broken wiring, short-circuit or poor connection to the PCB in the high-pressure sensor circuit.
Alarms are emitted when the low-pressure sensor becomes an electrical open-circuit or a short-circuit condi-. This system includes a function for automatic backup operation. An alarm is also displayed to inform the operator that a failure has occurred. Automatic backup mode is not engaged in cases of communications alarms, automatic reset alarms, and other instances when emergency operation is possible by pressing the remote controller buttons or changing other conditions.
If the above alarms occur, the alarm is displayed on the control device. Pressing the control device button again starts automatic backup mode. When 1 compressor has failed, backup operation is possible using the other compressors only in the model 8 Ton. However, operation does not occur when the outdoor fan is unable to operate as a result of alarm P When automatic backup mode is engaged, the outdoor unit where the above alarm occurred stops operating.
However, if one or more of the compressors is able to operate, then this outdoor unit operates only when the operation of all outdoor units is required for special control such as 4-way valve adjustment or other system purposes. If a wired remote controller is present, display blinks during operation.
Repair the outdoor unit where the failure occurred. When repairs are completed, reset the power on outdoor unit No.
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