Page Alarm Codes 6. Page Compressor Faults This board patented by Carrier also called AM board monitors both the compressor regime and the status of its crankcase heaters which ensure correct lubrication when the 6. Page 36 Order No. Supersedes order No. Manufacturer reserves the right to change any product specifications without notice. Printed in the Netherlands on totally chlorine-free paper. Print page 1 Print document 36 pages. Rename the bookmark. Delete bookmark?
Cancel Delete. Delete from my manuals? Sign In OR. Don't have an account? Sign up! Restore password. Upload manual. Upload from disk. Upload from URL. It consists of a 2-digit primary display block and a secondary 4-digit display block with 10 LEDs and 5 buttons. It comprises 12 buttons and 16 LEDs, and includes a schematic diagram of the unit. The basic board and slave boards communicate with each other over an internal three-wire RS communication bus SIO bus. These three wires link all the boards in parallel.
NOTE: Any incorrect address will prevent the unit from starting. Turn off the power before amending the address of any auxiliary board. All boards are supplied by a 24 V source, referred to earth.
In the event of a power supply interrupt, the unit restarts automatically without the need for an external command. However, any faults active when the supply is interrupted are saved and may in certain cases prevent a circuit or unit from restarting. All boards continuously check and indicate the proper operation of their electronic circuits. A light emitting diode LED lights on each board when it is operating properly.
If the basic board is not linked to any slave boards, this LED should not flash. If this connection is correct and the fault persists, replace the basic board. The EXV is used to adjust the refrigerant flow to changes in the operating conditions of the machine.
For this purpose, a series of calibrated orifices are machined into the wall of the refrigerant inlet port. As the refrigerant passes through these orifices, it expands and becomes a bi-phase mixture liquid and gas. To adjust the refrigerant flow to changes in operating conditions, a piston moves constantly up or down to vary the cross-section of the refrigerant path.
This piston is driven by an electronically controlled linear stepper motor. The high degree of accuracy with which the piston is positioned ensures that the flow of refrigerant is precisely controlled. The controller can regulate one or two evaporator pumps, with automatic changeover between the two pumps.
In appropriate cases the controller can regulate a condenser pump for water-cooled units or air-cooled units with heat reclaim option. This control does not require an additional board. These electronic sensors deliver 0 to 5 V d. Two sensor versions are used; one is calibrated for high pressure and the other for low pressure and oil pressure. These are on the high pressure side of the lead compressor in each circuit.
They replace the usual discharge gas pressure gauges and can be used to control head pressure or by the high pressure load shedding option. If installed, these sensors are used to measure the compressor oil pressure on the oil pressure discharge side. The suction pressure is subtracted from the oil pressure value to arrive at the differential oil pressure.
They are located in the low-pressure side of the unit on the lead compressor of each circuit. The suction pressure sensor reading is used to control the electronic expansion devices EXV. They permit replacement of the low-pressure switches, low-pressure gauges and possibly of the oil pressure safety switch. The evaporator entering water temperature sensor is installed in the evaporator wall in the free space at the side of the tube bundle.
The evaporator leaving water temperature sensor is installed in evaporator leaving water piping: The sensor bulb is directly immersed in the water. This is located in the lead compressor of each circuit in the suction gas line situated between the motor and the cylinders above the oil pump. These are used to control the heating capacity on heat pumps. In cooling only units they have no control function. They are installed in the common condenser entering and leaving line.
These sensors measure the entering and leaving water temperatures of heat reclaim condensers and are used on air-cooled units equipped with the heat reclaim option. If not, they may be fitted as options. In this case they only have informative character.
This is an optional V sensor which can be installed remotely from the unit. It is used to reset the cooling and heating setpoint on the unit as a function of either the outdoor air temperature or ambient room temperature. The sensor is not supplied by Carrier, and must be configured by the User Menu. Mounted on the control box. It is used for start-up, setpoint temperature reset and frost protection control.
Some of them can only be used in special operating modes. For further details see the sections that describe the functions section 5 and the configurations section 4. This contact permits activating the unit demand limit function. See section 5. This contact is active, whatever the operating type. The local interface enables a number of operating parameters to be displayed and modified. The interface consists of two distinct parts: the main interface left hand section and the summary interface right hand section.
It consists of:. Permits the selection of a main menu. Each main menu is represented by an icon. The icon is lit if active. Permits scrolling through the menu items in the two-digit display. If the modification mode is active this button authorises. By way of supplying much bigger choice we believe that our visitors can acquire the proper pdf they require. Millions discover their favorite reads on issuu every month.
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