FX2-CHILLER™ Digital Control Operations Manual Micro Air Corporation 124 Route 526 Allentown NJ 08501 Phone (609) 259-2636 www.Microair.
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.
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 Button Service 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 Screen Water Inlet Temperature Water Outlet Temperature Heating or Cooling Temperature Set Point 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.
System Status Screen AC Line voltage High Freon Pressure Switch (CLosed or OPen) Low Freon Pressure Switch (CLosed or OPen) System Current 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.
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.
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.
o o o o o o o o currents but running currents must be less than the set point. To disable this fault set the limit to 0. Low 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. High Limit Threshold: Set this parameter to monitor water outlet temperature.
Specifications Set point range Cool Mode Heat Mode 38°F-58°F or 3.3°C-14.4°C 95°F to 120°F or 35°C to 48.
PCB-360-00F and Earlier FXII Chiller Revision: 05 March 25, 2013 10
PCB-360-00G and later wiring diagram and configuration FXII Chiller Revision: 05 March 25, 2013 11
Updates: From To Reason Rev 3 Rev 4 Rev 4 Rev 5 Add parameter in FRM278B16 for Starter Present. Add fault descriptions for EasyStart and update wiring for 360 rev G boards COPYRIGHT © 2008 Micro Air Corporation, All Rights Reserved No part of this publication may be reproduced, translated, stored in a retrieval system, or transmitted in any form or by any means electronic, mechanical, photocopying, recording or otherwise without prior written consent by Micro Air Corporation.
