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ClimateMaster Tranquility Digital DXM2, Troubleshooting Manual

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ClimateMaster Tranquility Digital DXM2 Troubleshooting Manual Download Page 46

Tranquility

®

 D i g i t a l   ( D X M 2 ) — Tr o u b l e s h o o t i n g   G u i d e

R e v. :   1 0   M a r c h ,   2 0 1 5

46

G e o t h e r m a l   H e a t i n g   a n d   C o o l i n g

Hard Reset of Thermostat

B-K

Use a thermostat wire to connect TP2 and TP3 on the thermostat board.

Summary of Contents for Tranquility Digital DXM2

Page 1: ...V at Reversing Valve 35 Checking Reversing Valve at DXM2 35 A0 2 Jumper 36 Checking for Power at DXM2 36 Verifying DC Voltage on DXM2 Board 37 for Modulating Valve Check TXV Bulb Test 38 Verifying Dip...

Page 2: ...d heat pumps can do more harm than good because packaged heat pumps contain less refrigerant compared to split systems The first thing to do is always perform a water side check Heat of Extraction for...

Page 3: ...for heating or cooling A K Check for 24V at contactor 18 31 5 volts A M No Replace the DXM2 Board Check and possibly replace wiring No No Yes Yes Next Page Yes Yes No A A If it is still not communica...

Page 4: ...n the correct position Third notch aimed down in unit position Then reattach powerhead A C Next Page Replace pump power head No Is there voltage to the pump 197 254V A O The unit starts but the pump d...

Page 5: ...s on pages 53 54 Valve does function but when the unit shuts off the valve remains open Verify that the DC voltage on DXM2 between A0 2 and GND Voltage should be between 3 3 10VDC This is the output f...

Page 6: ...ull over internal slide while energizing A T B H Verify RV operation Replace the reversing valve if it still does not shift Next Page If Dipswitch 1 4 is on replace board A E Troubleshooting Flow Char...

Page 7: ...ps should be lower after removing plug Reattach plug and verify that amps return to previous higher reading Yes A S Replace compressor No Continued The unit started but runs and loop temp continue to...

Page 8: ...rmostat s unit configuration menu Yes Yes Does the unit have the correct ECM Motor Check the ECM table which is in the unit s IOM Compare to the motor in the unit Verify pump is supplying enough flow...

Page 9: ...254V at auxiliary heat strip Turn breaker on in panel or in auxiliary heat control B C No Yes Yes Replace wire harness No Does the heat strip control board have the same 24 VDC as the DXM2 Yes Replac...

Page 10: ...utor tubes If you can not install the sensor in that location then do not in stall the sensor any where else on the coil and leave jumper on DXM2 board 5 Ensure that TXV bulb is strapped outside of th...

Page 11: ...11 Tranquility Digital DXM2 Troubleshoot ing Guide Rev 10 Marc h 2 0 1 5 www climatemaster com Reference Symbols and Diagrams for Flow Chart...

Page 12: ...r Not buzzing Loose wire No voltage to coil No power to control circuit Voltage to coil Coil open circuited Alarm Relay Comp Relay C AL1 24Vdc EH1 EH2 P6 Off On JW3 A OVR ESD C R NSB AL2 JW1 Acc1 Rela...

Page 13: ...s moved up or toward center of valve and valve closes For Proper Valve to Head Alignment Before removing power head go to manual mode and open valve to 100 Stay on that screen and with the valve power...

Page 14: ...rch 2015 14 Geother mal Heating and Cooling Removing Powerhead on 1 Inch Modulating Valve A C 2 The 1 inch valve includes a tool to remove the power head See previous page for proper valve to head ali...

Page 15: ...Compressor Ohms Table Overload opens R S C Suction Line R S C R S C R S C Compressor with Open Internal Overload If both R and S are open to common Internal overload is open Overload opens R S C Suct...

Page 16: ...till pass the hi pot There are many factors that affect megohm readings including contaminated refrigerant oil level refrigerant in oil and current leakage through electrical fusites or terminal plate...

Page 17: ...3 2 Warm TVB Defective compressor Start to shift but does not complete reversal Hot Warm Warm Hot TVB Hot Not enough pressure differential at start of stroke or not enough flow to maintain pressure di...

Page 18: ...le See B D X Reduced or no water ow Check pump operation or valve operation setting in cooling Check water ow adjust to proper ow rate X Inlet water too hot Check load loop sizing loop back ll ground...

Page 19: ...air lter and clean or replace in cooling Check fan motor operation and air ow restrictions Too high of external static check static vs blower table X Air temperature out of range Too much cold vent ai...

Page 20: ...See A R X Improper low temperature setting 30 F vs 10 F Clip JW3 LT1 jumper for antifreeze use Be sure loop has 15 freeze protection X Water temperature out of range Bring water temp within design par...

Page 21: ...s Check for dirty air lter and clean or replace Check fan motor operation and air ow restrictions Too high of external static check static vs blower table Too much cold vent air bring entering air tem...

Page 22: ...ClimaDry Low Air Coil Temperature Fault ClimaDry Code 12 X Reduced air ow in cooling ClimaDry or constant fan Air temperature out of range Check switch continuity and operation replace Bad pressure sw...

Page 23: ...EXPANSION VALVE COOLING POSITION 9 LT2 HEATING LIQUID LINE 9 LT1 COOLING LIQUID LINE REFRIGERANT R 22 R 410A OPERATING MODE HEATING COOLING Description Heating Cooling Notes Water Side Analysis 1 Wat...

Page 24: ...at of Rejection HE or HR Btuh Enter HE or HR Flow Rate GPM x Temp Diff deg F x Fluid Factor Refrigerant Analysis 5 Suction Temp 6 Suction Pressure 6a Saturation Temp 6b Superheat 7 Discharge Temp 8 Di...

Page 25: ...ion TZ Coax Water Pressure Drop TE Coax Water Pressure Drop Model GPM Pressure Drop psi 30 F 50 F 70 F 90 F 026 4 0 6 0 7 0 8 0 1 5 3 1 4 1 5 1 1 3 2 6 3 4 4 3 1 1 2 3 3 0 3 8 1 0 2 1 2 7 3 4 038 4 0...

Page 26: ...hus run the risk of compressor failure Stores excess refrigerant in condenser Overcharged System High subcooling Superheat will be maintained by expansion valve at valve setting Basically no change in...

Page 27: ...grees above the boiling point Refer to the superheat Table 1 for superheat ranges at specific entering water conditions Example The temperature of the suction line at the sensing bulb is read at 59 F...

Page 28: ...ific entering water temperatures Example HFC 410A The condenser pressure at the high pressure service port is 340 psig which is equivalent to 105 F The liquid line between the air coil and TXV in heat...

Page 29: ...ng to auxiliary control board Alarm Relay Comp Relay 24Vdc EH1 EH2 P6 Off On JW3 A OVR ESD C R NSB AL2 JW1 Acc1 Relay Acc2 Relay H COM NC1 NO1 COM NC2 NO2 P3 CO RV RV LT1 LT1 LT2 LT2 LP LP HP HP P7 St...

Page 30: ...molex connection for electric heat harness Micro U1 Off On COH COM AO2 P11 Gnd T1 P10 T2 T2 T3 T3 T4 T4 T5 P9 T5 T6 T6 A0 1 A0 2 Off On S3 RV Relay CCH Relay Note There is only one T1 connection 1 2...

Page 31: ...ing Note Rating will change with different size units Verifying Capacitor A N Verify 197 254V on pump power cord Note Before removing cord from pump verify that power is turned off on unit or pump wil...

Page 32: ...Heating and Cooling Replacing Variable Speed Pump Power Head A P 1 You can remove power head from motor with 25 Torx driver if feedback is out of range 2 Remove plastic cover to remove Torx head scre...

Page 33: ...F 20 F 10 F 0 F 10 F 20 F 30 F 40 F 40 C 34 4 C 28 9 C 23 3 C 17 8 C 12 2 C 6 7 C 1 1 C 4 4 C 0 975 0 980 0 985 0 990 0 995 1 000 5 F 0 F 5 F 10 F 15 F 20 F 25 F 30 F 35 F 1 7 C 1 1 C 3 9 C 6 7 C 9 4...

Page 34: ...ification A S 2 When rectifier is removed verify that pins are not bent 1 Remove rectifier 3 Perform an amp draw and read the amps Then remove rectifier Amp draw should go down If there is no change i...

Page 35: ...age molex connection for electric heat harness icro U1 Off On P10 2 T3 T3 T4 T4 T5 P9 T5 T6 T6 A0 2 RV Relay CCH Relay Test 240Vac Fan Speed N O N C 12V OUT Gnd P8 IN NC P12 1 2 3 4 5 6 7 8 18 31 5 Vo...

Page 36: ...6 7 8 AO1 Gnd 1 18 31 5V A C Verify proper voltage to the board 2 If there is no 24V at DXM2 verify that the breaker is not tripped on the transformer Ensure that the power supply to your transformer...

Page 37: ...4 Factory Use 5 1 2 7 Use 4 mounting 6 sheet metal scre Micro U1 Off On COH COM AO2 P11 Gnd T1 P10 T2 T2 T3 T3 T4 T4 T5 P9 T5 T6 T6 A0 1 A0 2 Off On S3 RV Relay CCH Relay Note There is only one T1 con...

Page 38: ...gital DXM2 Troubleshoot ing Guide R ev 10 March 2015 38 Geother mal Heating and Cooling Suction pressure increases when warmed and decreases when bulb is cooled in cup of ice water Pressure Gauge TXV...

Page 39: ...essure water switches are only in units with modulating valves Note Switches are in series with high pressure refrigerant switch Dip switch 1 in On Position for Communicating Alarm Relay Comp Relay 24...

Page 40: ...her mal Heating and Cooling 1 Clamp on digital to read ref next to LT1 to verify sensor Verifying a Thermistor B B 2 Remove this Molex plug to check resistance of the FP1 LT1 sensor 3 Clamp on the met...

Page 41: ...8 09 82 179 6 1 18 13 55 4 17 26 83 181 4 1 14 14 57 2 16 46 84 183 2 1 10 15 59 0 15 71 85 185 0 1 07 16 60 8 15 00 86 186 8 1 04 17 62 6 14 32 87 188 6 1 01 18 64 4 13 68 88 190 4 0 97 19 66 2 13 07...

Page 42: ...nd free Use a Magnetic Static Pressure Tip tool far right to check the static pressure Add both together to get Total Static Example 39 Static Pressure Tranquility 22 TZ Series Airflow in CFM with wet...

Page 43: ...ersion 3 3 17B0002N06 Version 1 2 17B0002N05 17B0002N02 with 3 Yellow Dots 2 Yellow Dots 1 Yellow Dot Version 1 1 3 Gray Dots Version 1 0 2 Gray Dots Version 0 3 1 Gray Dot Shows up as nothing No Dots...

Page 44: ...e side or another Verify that dipswitch number 1 is in the On position If dipswitch number 1 is in the Off position the thermostat will not function Under most residential situations dipswitch banks 1...

Page 45: ...Relay Comp Relay O Y1 Y2 W G C R AL1 24Vdc EH1 EH2 P6 R C Off On JW3 A OVR ESD C R NSB AL2 JW1 Acc1 Relay Acc2 Relay H COM NC1 NO1 COM NC2 NO2 P3 CO RV RV LT1 LT1 LT2 LT2 LP LP HP HP P7 Status Fault R...

Page 46: ...Tranquility Digital DXM2 Troubleshoot ing Guide R ev 10 March 2015 46 Geother mal Heating and Cooling Hard Reset of Thermostat B K Use a thermostat wire to connect TP2 and TP3 on the thermostat board...

Page 47: ...in Y1 and Y2 if valve position moves slightly below 50 open there is a greater impact on GPM Putting a pressure reducing valve ahead of heat pump will prevent valve from moving below 50 open Set pres...

Page 48: ...lectrical Power Wiring B M Electrical Power Wiring B N Remove Harness Plug Note For 115v power only Damage will occur to motor with 230v power supply if 115v jumper is used Install Two Pin Jumper Plug...

Page 49: ...MPORTANT Always protect TXV from heat when brazing IMPORTANT TXV sensing bulb is shipped unattached Installer must attach bulb to suction line after brazing and cooling line for proper unit operation...

Page 50: ...g Valve O W Auxiliary Heat W 24Vac Hot R Fan G 24Vac Common C DH Dehumidification ATP32U04 Only C A B C A B 24V 24V ATC32U02 24 V B A C Thermostat Connections C 24V Common for Control Circuit R 24V Su...

Page 51: ...tacts may be closed but not conducting electri cally To check this disconnect power circuit If unit starts replace overload if it is located in the electrical box If unit does not start the trouble is...

Page 52: ...to under charge superheat too high or restriction in refrigerant circuit HIGH OR LOW VOLTAGE Check nameplate on unit for voltage rating Check voltage at contactor or starter while the unit is operatin...

Page 53: ...24V 240Vac Fan Speed N O N C 12V OUT Gnd P8 IN NC P12 Note There is only one T1 connection 1 2 3 4 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 Service tool connection Communicating stat connection Conventional s...

Page 54: ...oling Fan Connections Electric Heat Connections 9 wire connection to non communicating thermostat compressor section 4 wire connection to communicating thermostat 4 wire connection to DXM2 Accessory o...

Page 55: ...lay Setting Jumper 1 JW1 AL2 Dry provides field selection of alarm function when Alarm Relay is ener gized Not Clipped AL1 connected to R 24VAC with Alarm Relay active Clipped Dry contact connection b...

Page 56: ...2 8 Factory Setting Normal position is On Do not change selection unless instructed to do so by the Factory DIP Package 3 S3 DIP Package 3 is 4 position and provides the following setup selections DI...

Page 57: ...Pressure fault recognition is immediate does not delay for 30 continuous seconds before de energizing the compressor When the Test mode is activated the Fault LED will display a fault code of 2 for a...

Page 58: ...ition the control will continue to operate using default operating parameters When the Test mode is active the Fault LED will display a fault code of 10 for an ECM Blower fault Fault Code 11 Low Air C...

Page 59: ...59 Tranquility Digital DXM2 Troubleshoot ing Guide Rev 10 Marc h 2 0 1 5 www climatemaster com Typical Wiring Diagram 96B0005N55...

Page 60: ...rch 2015 60 Geother mal Heating and Cooling DXM2 Wiring Diagram with Internal Flow Controller 96B0005N60 This diagram includes typical wiring details but is not applicable to all units For specific un...

Page 61: ...Marc h 2 0 1 5 www climatemaster com DXM2 Wiring Diagram with Motorized Modulating WaterValve 96B0005N62 This diagram includes typical wiring details but is not applicable to all units For specific un...

Page 62: ...iary heat Multi Fuel for control of a system with furnace for auxiliary heat No Auxiliary Heat for control of a system with no auxiliary heat 2 2 2 1 AUXILIARY HEAT CONFIGURATION Select Electric Auxil...

Page 63: ...l not be present if the connected communicating control is configured for No Loop Configuration OTHER 3 1 AIRFLOW SELECTION Adjust the airflow settings for each system operating mode using the up down...

Page 64: ...P CONFIG VS PUMP SELECT OPTION PREVIOUS SAVE VARIABLE SPD INTERNAL PUMP CONFIGURATION LOOP OPTION PARALLEL PUMP CONTROL DELTA T HEATING DELTA T 7 F COOLING DELTA T 10 F MAXIMUM HEAT LWT 80 F MINIMUM C...

Page 65: ...F MINIMUM COOL LWT 40 F PREVIOUS SELECT 3 5 VALVE CONFIGURATION Configure temperature differentials at the thermostat for vFlow units with a motorized modulating valve Adjust the Valve Configuration...

Page 66: ...ings as well as the operational status of the pump at the thermostat Navigate between diagnostic screens using the left right arrow buttons NOTE 1 The Pump Status will not be present if the connected...

Page 67: ...temperature readings that were recorded at the time the fault occurred NOTE If multiple units are connected to one thermostat refer to section 9 6 CONTROL CONFIGURATION DIPSWITCH S1 1 ON UPS ENABLED 2...

Page 68: ...ssible causes as to why the fault occurred NOTE If multiple units are connected to one thermostat refer to section 9 7 9 5 CLEAR FAULT HISTORY Clear Fault History will clear all fault codes stored in...

Page 69: ...69 Tranquility Digital DXM2 Troubleshoot ing Guide Rev 10 Marc h 2 0 1 5 www climatemaster com Notes...

Page 70: ...Tranquility Digital DXM2 Troubleshoot ing Guide R ev 10 March 2015 70 Geother mal Heating and Cooling...

Page 71: ...71 Tranquility Digital DXM2 Troubleshoot ing Guide Rev 10 Marc h 2 0 1 5 www climatemaster com...

Page 72: ...ent design and specifications Statements and other information contained herein are not express warran ties and do not form the basis of any bargain between the parties but are merely ClimateMaster s...

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