Micro Air Corporation FX2-CHILLER Manuale utente

FX2-CHILLER™

Digital Control

Operations Manual

Micro Air Corporation Phone (609) 259-2636

124 Route 526 www.Microair.net

Allentown NJ 08501 Fax (609) 259-6601

FXII Chiller Revision: 05 March 25, 2013 2

Introduction:

The FX2-CHILLER digital control operates onboard tempered water equipment

to provide closed loop water temperature control. The FX2-CHILLER digital control is

designed to operate with central type tempered water marine air-conditioning systems.

Features include:

High visibility Organic Light Emitting Diode display (OLED) offers superior

visual characteristics compared to LCD displays.

Variable brightness adjustment and automatic screen saver.

Four position menu navigation switch featuring a joystick style interface with

push on / push off control.

The display is compatible with Vimar and Gewiss frames.

Visual symbols enable the viewer to see the operating status at a glance.

Easily programmed for customized operation.

Built in options for fault protection help aid trouble diagnosis and prevent

system damage.

Universal 115/230 VAC 50/60 Hz power supply.

FXII Chiller Revision: 05 March 25, 2013 3

Before you start:

1. Applying power:

When power is first applied, the display will show the software revision, and

then return to the last state the unit was in when power was removed.

On/Off Button

Up Button

Mode Select Service Button

Button (Unmarked)

Down Button

2. Joystick operation:

The four position joystick may be tapped up, down, right, left or in the center

to make changes to the operation of the control. Gently tap this switch to

operate it. Excessive force will damage the switch.

3. Operating states:

Pressing the joystick in the center will toggle between OFF and ON. When the

display is OFF the display will appear dark**. When the display is ON, the

display shows the operating screen**. See operating screens for an example.

Switch between these states by pressing and releasing the On/Off button.

**Unless screen saver is active. See screen saver for details.

Operating Screens

Screen Saver

If no buttons are pressed for two minutes, the display will enter the screen saver

mode. The display will dim and icons will scroll across the screen. To exit this mode, just

tap any button.

FXII Chiller Revision: 05 March 25, 2013 4

Operating Screen

Water Inlet Temperature Water Outlet Temperature

Heating

Temperature Set Point or

Cooling

Operating Status Icon

Mode Selection

To change from heating to cooling or cooling to heating, tap the mode select

button. Set the desired loop water temperature by tapping the up or down button. The

system will provide cooling or heating as selected.

Operation

The control will automatically operate the circulating pump, sea water pump,

compressor and heater or valve as necessary. Inlet temperature must be more than two

degrees from the set point for operation to occur. In heat mode, temperatures must be

below set point and in cool mode temperatures must be above the set point. Temperatures

must be above 33°F for any operation. Operating output conditions are indicated in the

icon at the center of the display.

CW is the closed circulating water loop. When the pump is on, the icon

will animate and show water flow in the system. If the flow switch opens,

or the pump is off, the pipe will appear empty.

This is the compressor symbol. When the compressor is running, the

symbol will look like an operating piston.

SW is the sea water pump. When the pump is on, the symbol will animate and

show the pump operating and water flowing. When the sea water pump is off, the

pipe will appear empty and the pump will not spin.

This is the electric heat symbol. This symbol will appear in heat mode in

place of the compressor if the optional electric heater is installed and

selected in the programmable parameters. The animation will look like

heat rising from the element when the heater is on.

FXII Chiller Revision: 05 March 25, 2013 5

System Status Screen

AC Line voltage High Freon Pressure Switch

(CLosed or OPen)

System Current Low Freon Pressure Switch

(CLosed or OPen)

System Frequency Flow Switch

(CLosed or OPen)

Viewing System Status

In the ON state, press and hold the Mode select button for three seconds. The

display will indicate AC line voltage, System current, AC Line frequency, and High and

Low pressure switch status and Flow switch status. After one minute without a button

press, the display will return to the operating screen.

Viewing Fault History

Fault message history may be viewed by pressing and holding the service button

for three seconds with the display in the operating screen. Scroll from message to

message by tapping the up and down buttons. The past eight fault messages, numbered

from 1 to 8 can be viewed with the most recent numbered 1. Multiple faults of the same

type will not be listed separately unless they occur more than one hour from the first

fault. To clear the history log, the screen must show the operate screen. Press and hold

the service button for 10 seconds. The history log will appear then the displayed fault will

disappear indicating the log is cleared.

Fault Messages

The following fault messages will be shown on the display in the event of a

problem. Compressor and electric heat operation is prevented for two minutes after a

fault occurs. Following this two minute period, the control will restart in the last mode of

operation. Pressing the on / off button twice will return the display to the operating screen

but operation will not resume for two minutes. Repeated faults are an indication of a

problem and should be checked by a qualified service person.

LOCKOUT Four of the same faults occurred in less than 1 hour from the first

fault. The display will show the fault that caused the lockout followed by the word

“LOCKOUT”. Press the On/Off button twice on the display to clear a lockout.

HIGH FREON PRESSURE: Indicates the high pressure switch connected to the

High/Low Freon jack is open. If the switch resets, the compressor will restart within two

minutes.

LOW FREON PRESSURE: Indicates low pressure switch connected to the

High/Low Freon jack is open for over 10 minutes. The LP jumper (JP7) on the FX2

power supply must be cut to enable this option.

LOW AC VOLTAGE: The AC line voltage was below the voltage set in the

programmable parameters for more than 10 minutes.

FXII Chiller Revision: 05 March 25, 2013 6

OVER CURRENT: The total system run current exceeded the limit set in the

programmable parameters. Systems may start with currents exceeding the limit but must

be below the limit within two seconds after the start of the compressor.

FREEZE FAULT: The closed circulating loop water temperature at the water

outlet sensor is below 34°F. This fault causes an immediate lockout for system

protection.

FLOW SWITCH OPEN: The closed circulating water loop flow switch connected

to the service input is open for more than 10 seconds. When this fault occurs, all outputs

will shut down for two minutes then restart.

SENSOR TROUBLE WATER IN: The sensor connected to the ALT AIR jack

(Loop water in) has failed or is disconnected.

SENSOR TROUBLE WATER OUT: The sensor connected to the OUTSIDE jack

(Loop water out) has failed or is disconnected.

HIGH LIMIT: Closed circulating loop water outlet temperature has exceeded the

limit set in the programmable parameters.

KLIXON OPEN: EasyStart has detected a problem with the compressor most

likely an open compressor overload protector. EasyStart will wait 3 minutes before

attempting a restart. Systems without EasyStart should set the program parameter “Starter

Present” to “NO” to prevent this error.

COMPRESSOR STALLED: EasyStart has detected a problem with the

compressor most likely a stalled compressor. EasyStart will wait 3 minutes before

attempting a restart. Systems without EasyStart should set the program parameter “Starter

Present” to “NO” to prevent this error.

FXII Chiller Revision: 05 March 25, 2013 7

Program Parameters:

There are eleven programmable parameters with their factory defaults described

in this section. The table below defines the parameter descriptions along with the

permitted values and default settings.

To enter the program mode first put the unit in the off state. Press and hold the

joystick in the center for 3 seconds. Use the fan button to advance to the next parameter

and the mode button to go back to the last parameter. Use the up and down buttons to

change the parameters value. Exit the program mode when finished by pressing and

releasing the On/Off button or wait 60 seconds for the display to exit. Note: program

mode can also be entered by pressing the following sequence of buttons: Mode, Up,

Down, Mode in the off mode.

Description Default Value

Display brightness 15 4=Minimum 15=Maximum

Screen Saver Brightness

4 0=Minimum 8=Maximum

Staging Delay 15 or 45* 5-135 Seconds

Current Limit 35 0-35 Amps (0 is disabled)

Low AC Line Detection Off 75-100 or 175-200 VAC

High Limit Threshold 130 100-135°F

System Units °F °F or °C

Cycle Sea Pump Cycled Sea Pump Cycled or Continuous

Reverse Cycle Heat Reverse Cycle Heat

Electric Heat or Reverse Cycle Heat

Purge Air in System No Yes or No

Starter Present No Yes or No

Reset Parameters No No or Yes

If JP8 is removed, Staging Delay default will be 45 seconds.

Parameter description:

oDisplay brightness: Display brightness can be set from 4 (dim) to

15 (bright) to suit room lighting. Brightness will change as the

number is changed.

oScreen saver brightness: Number values from 0 (dim) to 8

(bright) can be set to suit room brightness. The unit will operate as

described in the screen saver section.

oStaging delay: The compressor staging delay is provided for

multi system installations where more than one system is operating

from the same power source. Set the Staging delays at different

intervals so only one compressor starts at a time when power is

applied.

oCurrent limit: The system current limit can be set from 0 to 35

Amps maximum running current. Systems may start at higher

FXII Chiller Revision: 05 March 25, 2013 8

currents but running currents must be less than the set point. To

disable this fault set the limit to 0.

oLow AC line detection: When set, if the AC line voltage remains

below the set value for 10 minutes, the control will turn off the

compressor or heater and indicate Low AC. Voltages may be set

between 75 and 100 VAC for 120 volt systems, and 175-200 VAC

for 208-230 VAC systems.

oHigh Limit Threshold: Set this parameter to monitor water outlet

temperature. Temperatures may be selected between 100°F and

135°F.

oSystem units: Degrees Fahrenheit (°F) or degrees Celsius (°C) can

be selected

oCycled Sea Pump: This setting will turn on the sea pump with the

compressor. This parameter may be changed to run the Sea Pump

continuously.

oElectric Heat/ Reverse Cycle Heat: Set this parameter only if the

system is equipped with an electric heater. If the heater current

will exceed 10 Amps, a contactor must be connected to the valve

output to use this feature.

oPurge Air in System: This parameter allows the user to operate

the circulating pump for one hour while the system is being filled

so air can be removed. Set the parameter to YES and press the

On/Off button. The display will go blank then the screen saver will

appear with “PURGING AIR” on the screen. The circulating loop

water pump will run for 1 hour then turn off. To exit this function,

press the On/Off button. Flow faults are disabled while Purge Air

is active. Flow switch status may be viewed in the system status

screen. See Viewing System Status for details.

oStarter Present: Set this parameter to YES only if the EasyStart

option board is installed on top of the FXII power supply. This

option must be set for No for ALL other systems including

EasyStart systems where the EasyStart option board is NOT

installed on the FXII power supply such as those systems with

EasyStart in an external box.

oReset parameters: To reset all parameters to factory defaults,

select YES and then exit the program mode by pressing the

joystick center button. The display will show EEPROM RESET

then the display will go blank indicating the unit is OFF.

Staging two compressors in a system:

In some applications, two compressors may be necessary to handle the cooling or

heating load. On these systems, remove jumper JP8 from one of the two power supplies.

(see Wiring Diagram and Configuration for jumper location details). With JP8 removed,

the second unit will operate at a different default set point and staging delay.

Defaults:

JP8 In: Cool 42°F, Heat 110°F, Staging Delay 15 Seconds

JP8 Out: Cool 44°F, Heat 108°F, Staging Delay 45 Seconds

FXII Chiller Revision: 05 March 25, 2013 9

Specifications

Set point range Cool Mode 38°F-58°F or

3.3°C-14.4°C

Heat Mode 95°F to 120°F or

35°C to 48.9°C

Sensor accuracy 2°F at 77°F

Low voltage limit 115 VAC units 75VAC

Low voltage limit 230 VAC units 175VAC

Line voltage limit 240VAC

Frequency 50 or 60 Hz

Fan output MAX

(Connect to Sea Water Pump) 4 Amps

Valve output MAX

(Connect to optional electric heater) 10 Amps

Circulating Pump output MAX ¼ HP at 115 VAC

½ HP at 230 VAC

Compressor output 1HP at 115 VAC

2HP at 230 VAC

Minimum operating temperature 0°F

Maximum operating temperature 180°F

Maximum RHconditions 99% Non-condensing

Maximum length of the display cable 75 Feet

Maximum length of the sensor cable 50 Feet

FXII Chiller Revision: 05 March 25, 2013 10

PCB-360-00F and Earlier

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