Table of Contents
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Communicating Service Tool
Connection ..............................................................................3
Menu Structure ........................................................................4
System Configuration ..............................................................4
Airflow Selection ......................................................................4
Option Selection ......................................................................5
Unit Configuration ....................................................................5
Pump Configuration .................................................................6
Valve Configuration .................................................................6
Installation and
Operation Manual
7602-444
Table of Contents
www.marsdelivers.com
Multi-Unit Configuration ...........................................................7
Service Mode...........................................................................8
Manual Operation ....................................................................8
Control Diagnosis ....................................................................8
Dipswitch Configuration ...........................................................9
Fault History ............................................................................9
Clear Fault History ................................................................. 11
Revision History.....................................................................12
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Table of Contents
Summary of Contents for Mars Comfort-Aire Century 7602-444
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Page 1: Table Of Contents
Installation and Operation Manual 7602-444 Communicating Service Tool Table of Contents Connection ................3 Multi-Unit Configuration ............7 Menu Structure ................4 Service Mode................8 System Configuration ..............4 Manual Operation ..............8 Airflow Selection ..............4 Control Diagnosis ..............8 Option Selection ..............5 Dipswitch Configuration ............9 Unit Configuration ..............5 Fault History ................9 Pump Configuration ..............6 Clear Fault History .............. - Page 2 Equivalent Model Numbers Heat Controller Climate Master HE-Series HZ-Series HZS-Series HB-Series 0.5-5T HB-Series 7-25T HKV-Series HRC-Series...
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Page 3: Connection
IOM - 7602-444 Communicating Service Tool 1.0 Connection Comfort-Aire/Century Communicating Service Tool 7602-444 allows install and service technicians to configure and diagnose Comfort-Aire/Century Digital Communicating Units without installing a digital communicating thermostat. Using the Service Tool, a technician can ELECTRONICALLY: 1. -
Page 4: Menu Structure
IOM - 7602-4 Communicating Service Tool 2.0 Menu Structure Menu Structure System Configuration Airflow Selection Option Selection Unit Configuration Pump Configuration Valve Configuration Service Mode Manual Operation Control Diagnostics Dipswitch Configuration Fault History SERVICE TOOL MENU Clear Fault History SYSTEM CONFIG SERVICE MODE 3.0 System Configuration Use the System Configuration option on the start-up screen... -
Page 5: Option Selection
IOM - 7602-444 Communicating Service Tool OPTION SELECTION OPTION SELECTION This option allows the configuration of heat pump options to be modified. MOTORIZED VALVE Adjust the Option settings using the up/down arrow buttons. COMPRESSOR ASCD Press the center button to select each item. •... -
Page 6: Pump Configuration
IOM - 7602-4 Communicating Service Tool VARIABLE SPD INTERNAL PUMP CONFIGURATION PUMP CONFIGURATION vFlow™ vs internal flow control pump can be controlled either through temperature differential (Delta T) or can be set to LOOP OPTION PARALLEL specific speed (fixed; % of full speed for each heat and cool PUMP CONTROL DELTA T stage). -
Page 7: Multi-Unit Configuration
IOM - 7602-444 Communicating Service Tool MULTI-UNIT CONFIGURATION If multiple units are connected to one 7602-457 thermostat upon unit start-up, the thermostat will automatically register the serial numbers of all units connected to it. NOTE: Multiple units may be connected directly to the 7602- 457 thermostat or connected to one another in series, as shown by the figure below. -
Page 8: Service Mode
IOM - 7602-4 Communicating Service Tool SERVICE MODE 4.0 Service Mode MANUAL OPERATION CONTROL DIAGNOSTICS MANUAL OPERATION Manual Operation mode allows service personnel to manually DIPSWITCH CONFIG command operation for any of the thermostat outputs, blower FAULT HISTORY speed, as well as pump speed or valve position to help troubleshoot specific components. -
Page 9: Dipswitch Configuration
IOM - 7602-444 Communicating Service Tool DIPSWITCH CONFIGURATION CONTROL CONFIGURATION DIPSWITCH S1 Dipswitch Configuration mode allows the service personnel to view the status of all dipswitch settings for the connected ON UPS ENABLED communicating control (DXM2/AXM) at the thermostat. ON DUAL COMP STG 1 ON HEAT PUMP TSTAT ON RV O THERMOSTAT Navigate between configuration screens using the left/right... - Page 10 IOM - 7602-4 Communicating Service Tool FAULT CONDITION MENU LT1 LOW WATER TEMP 4.4.0 Fault Conditions Menu HEAT 1 11:11 AM 11/14 FAULT TEMP CONDITIONS FAULT FLOW CONDITIONS FAULT I/O CONDITIONS FAULT CONFIG COND FAULT POSSIBLE CAUSES PREVIOUS SELECT FAULT TEMPERATURE CONDITIONS LT1 LOW WATER TEMP 4.4.1 Temperature Conditions HEAT 1 11:11 AM 11/14...
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Page 11: Clear Fault History
IOM - 7602-444 Communicating Service Tool 4.4.3 Configuration Conditions FAULT CONFG CONDITIONS Displays the status of all dipswitch settings that were LOW WATER TEMP recorded at the time the fault occurred. HEAT 1 11:11 AM 11/14 WELL WELL PREVIOUS 4.4.4 Possible Causes POSSIBLE FAULT CAUSES Displays possible causes as to why the fault occurred LOW WATER COIL TEMP... -
Page 12: Revision History
IOM - 7602-4 Communicating Service Tool 1900 Wellworth Ave., Jackson, MI 49203 • Ph. 517-787-2100 • www.marsdelivers.com 6/2022...
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