Climate Master Tranquility User Manual

THE SMART SOLUTION FOR ENERGY EFFICIENCY

Water Coil Maintenance - (Direct ground water
applications only) If the system is installed in an area with
a known high mineral content (125 P.P.M. or greater) in
the water, it is best to establish a periodic maintenance
schedule with the owner so the coil can be checked
regularly. Consult the well water applications section
of this manual for a more detailed water coil material
selection. Should periodic coil cleaning be necessary, use
standard coil cleaning procedures, which are compatible
with the heat exchanger material and copper water
lines. Generally, the more water fl owing through the unit,
the less chance for scaling. Therefore, 1.5 gpm per ton
[1.6 l/m per kW] is recommended as a minimum fl ow.
Minimum fl ow rate for entering water temperatures
below 50°F [10°C] is 2.0 gpm per ton [2.2 l/m per kW].

Water Coil Maintenance - (All other water loop
applications) Generally water coil maintenance is not
needed for closed loop systems. However, if the piping
is known to have high dirt or debris content, it is best
to establish a periodic maintenance schedule with the
owner so the water coil can be checked regularly. Dirty
installations are typically the result of deterioration of iron
or galvanized piping or components in the system. Open
cooling towers requiring heavy chemical treatment and
mineral buildup through water use can also contribute
to higher maintenance. Should periodic coil cleaning be
necessary, use standard coil cleaning procedures, which
are compatible with both the heat exchanger material
and copper water lines. Generally, the more water fl owing
through the unit, the less chance for scaling. However,
fl ow rates over 3 gpm per ton (3.9 l/m per kW) can
produce water (or debris) velocities that can erode the
heat exchanger wall and ultimately produce leaks.

Hot Water Generator Coils - See water coil
maintenance for ground water units. If the potable
water is hard or not chemically softened, the high
temperatures of the desuperheater will tend to scale
even quicker than the water coil and may need more
frequent inspections. In areas with extremely hard water,
a HWG is not recommended.

Filters - Filters must be clean to obtain maximum
performance. Filters should be inspected every month
under normal operating conditions and be replaced
when necessary. Units should never be operated without
a fi lter.

Washable, high effi ciency, electrostatic fi lters, when dirty,
can exhibit a very high pressure drop for the fan motor
and reduce air fl ow, resulting in poor performance. It is
especially important to provide consistent washing of

climatemaster.com

Tranquility

®

30 Digital (TE)

Rev.: January 30, 2019

Preventive Maintenance

these fi lters (in the opposite direction of the normal air
fl ow) once per month using a high pressure wash similar

to those found at self-serve car washes.
Condensate Drain - In areas where airborne bacteria

may produce a “slimy” substance in the drain pan, it may
be necessary to treat the drain pan chemically with an
algaecide approximately every three months to minimize
the problem. The condensate pan may also need to be
cleaned periodically to ensure indoor air quality. The
condensate drain can pick up lint and dirt, especially with
dirty fi lters. Inspect the drain twice a year to avoid the
possibility of plugging and eventual overfl ow.

Compressor - Conduct annual amperage checks to
ensure that amp draw is no more than 10% greater than
indicated on the serial plate data.

Fan Motors - All units have lubricated fan motors. Fan
motors should never be lubricated unless obvious, dry
operation is suspected. Periodic maintenance oiling is
not recommended, as it will result in dirt accumulating in
the excess oil and cause eventual motor failure. Conduct
annual dry operation check and amperage check to
ensure amp draw is no more than 10% greater than
indicated on serial plate data.

Air Coil - The air coil must be clean to obtain maximum
performance. Check once a year under normal operating
conditions and, if dirty, brush or vacuum clean. Care
must be taken not to damage the aluminum fi ns while
cleaning. When the heat pump has experienced less
than 100 operational hours and the coil has not had
suffi cient time to be “seasoned”, it is necessary to clean
the coil with a mild surfactant such as Calgon to remove
the oils left by manufacturing processes and enable the
condensate to properly “sheet” off of the coil.
CAUTION: Fin edges are sharp.

Cabinet - Do not allow water to stay in contact with the
cabinet for long periods of time to prevent corrosion of
the cabinet sheet metal. Generally, vertical cabinets are
set up from the fl oor a few inches [7 - 8 cm] to prevent
water from entering the cabinet. The cabinet can be
cleaned using a mild detergent.

Refrigerant System - To maintain sealed circuit integrity,
do not install service gauges unless unit operation
appears abnormal. Reference the operating charts for
pressures and temperatures. Verify that air and water
fl ow rates are at proper levels before servicing the
refrigerant circuit.

53

CLIMATEMASTER WATER-SOURCE HEAT PUMPS

Tranquility

Rev.: January 30, 2019

®

30 Digital (TE)

Troubleshooting

General

If operational diffi culties are encountered, perform
the preliminary checks below before referring to the
troubleshooting charts.

• Verify that the unit is receiving electrical supply power.

• Make sure the fuses in the fused disconnect switches
are intact.

After completing the preliminary checks described
above, inspect for other obvious problems such as
leaking connections, broken or disconnected wires, etc.
If everything appears to be in order, but the unit still fails
to operate properly, refer to the “DXM2 Troubleshooting
Process Flowchart” or “Functional Troubleshooting
Chart.”

DXM2 Board

DXM2 board troubleshooting in general is best
summarized as verifying inputs and outputs. After inputs
and outputs have been verifi ed, board operation is
confi rmed and the problem must be elsewhere. Below
are some general guidelines for troubleshooting the
DXM2 control.

Field Inputs

Conventional thermostat inputs are 24VAC from the
thermostat and can be verifi ed using a voltmeter
between C and Y1, Y2, W, O, G. 24VAC will be present at
the terminal (for example, between “Y1” and “C”) if the
thermostat is sending an input to the DXM2 board.

Proper communications with a thermostat can be verifi ed
using the Fault LED on the DXM2. If the control is NOT
in the Test mode and is NOT currently locked out or
in a retry delay, the Fault LED on the DXM2 will fl ash
very slowly (1 second on, 5 seconds off), if the DXM2 is
properly communicating with the thermostat.

Outputs

The compressor and reversing valve relays are 24VAC
and can be verifi ed using a voltmeter. For units with
ECM blower motors, the DXM2 controls the motor using
serial communications, and troubleshooting should be
done with a communicating thermostat or diagnostic
tool. The alarm relay can either be 24VAC as shipped or
dry contacts for use with DDC controls by clipping the
JW1 jumper. Electric heat outputs are 24VDC “ground
sinking” and require a voltmeter set for DC to verify
operation. The terminal marked “24VDC” is the 24VDC
supply to the electric heat board; terminal “EH1” is stage
1 electric heat; terminal “EH2” is stage 2 electric heat.
When electric heat is energized (thermostat is sending a
“W” input to the DXM2 controller), there will be 24VDC
between terminal “24VDC” and “EH1” (stage 1 electric
heat) and/or “EH2” (stage 2 electric heat). A reading
of 0VDC between “24VDC” and “EH1” or “EH2” will
indicate that the DXM2 board is NOT sending an output
signal to the electric heat board.

Test Mode

Test mode can be entered for 20 minutes by pressing the
Test pushbutton. The DXM2 board will automatically exit
test mode after 20 minutes.

 WARNING! 

WARNING! HAZARDOUS VOLTAGE! DISCONNECT ALL

ELECTRIC POWER INCLUDING REMOTE DISCONNECTS
BEFORE SERVICING.
Failure to disconnect power before servicing can cause
severe personal injury or death.

Sensor Inputs

All sensor inputs are ‘paired wires’ connecting each
component to the board. Therefore, continuity on
pressure switches, for example can be checked at the
board connector. The thermistor resistance should be
measured with the connector removed so that only the
impedance of the thermistor is measured. If desired, this
reading can be compared to the thermistor resistance
chart shown in Table 8. An ice bath can be used to check
the calibration of the thermistor.

54

ClimateMaster Water-Source Heat Pumps

THE SMART SOLUTION FOR ENERGY EFFICIENCY

Advanced Diagnostics

If a communicating thermostat or diagnostic tool
(ACDU) is connected to the DXM2, additional diagnostic
information and troubleshooting capabilities are
available. The current status of all DXM2 inputs can be
verifi ed, including the current temperature readings of all
temperature inputs. With a communicating thermostat
the current status of the inputs can be accessed from
the Service Information menu. In the manual operating
mode, most DXM2 outputs can be directly controlled
for system troubleshooting. With a communicating
thermostat the manual operating mode can be accessed
from the Installer menu. For more detailed information
on the advanced diagnostics of the DXM2, see the
DXM2 Application, Operation and Maintenance (AOM)
manual (part #97B0003N15).

DXM2 Troubleshooting Process Flowchart/Functional
Troubleshooting Chart

The “DXM2 Functional Troubleshooting Process
Flowchart” is a quick overview of how to start diagnosing
a suspected problem, using the fault recognition features
of the DXM2 board. The “Functional Troubleshooting
Chart” on the following page is a more comprehensive
method for identifying a number of malfunctions that
may occur, and is not limited to just the DXM2 controls.
Within the chart are fi ve columns:

• The “Fault” column describes the symptoms.

• Columns 2 and 3 identify in which mode the fault is
likely to occur, heating or cooling.

• The “Possible Cause column” identifies the most likely
sources of the problem.

• The “Solution” column describes what should be done to

correct the problem.

Tranquility

®

30 Digital (TE)

Rev.: January 30, 2019

Troubleshooting (Continued)

climatemaster.com

55

CLIMATEMASTER WATER-SOURCE HEAT PUMPS

Tranquility

Rev.: January 30, 2019

®

30 Digital (TE)

DXM2 Process Flow Chart

 WARNING! 

WARNING! HAZARDOUS VOLTAGE! DISCONNECT ALL

ELECTRIC POWER INCLUDING REMOTE DISCONNECTS
BEFORE SERVICING.
Failure to disconnect power before servicing can cause
severe personal injury or death.

Start

DXM2 Functional
Troubleshooting Flow Chart

See “Unit

short

cycles”

Yes

Did Unit

Attempt to

Start?

Yes

Did Unit

Lockout at

Start-up?

No

Unit Short

Cycles?

No

No

Yes

Check Main

power (see power

problems)

Check fault code on communicating

thermostat (ATC32) or Configuration

and Diagnostics Tool (ACD01)

No fault

shown

Replace

DXM2

See “Only

Fan Runs”

See “Only

Comp

Runs”

See “Does

not Operate

in Clg”

Yes

Yes

No

Only Fan

Compressor

Did unit lockout

after a period of

operation?

Does unit

operate in

cooling?

Unit is OK!

‘See Performance

Troubleshooting’ for

further help

Runs?

Only

Runs?

Yes

See fault codes in table

on following page

No

No

Yes

No

56

ClimateMaster Water-Source Heat Pumps

THE SMART SOLUTION FOR ENERGY EFFICIENCY

Fault Htg Clg Possible Cause Solution

Check line voltage circuit breaker and disconnect.

Main power problems

HP Fault
Code 2

High Pressure

LP/LOC Fault
Code 3

Low Pressure / Loss of Charge

LT1 Fault
Code 4

Water coil low
temperature limit

LT2 Fault
Code 5

Air coil low
temperature limit

Condensate Fault
Code 6

Over/Under
Voltage Code 7

(Auto resetting)

Unit Performance Sentinel
Code 8

Swapped Thermistor
Code 9

ECM Fault - Code 10

Low Air Coil Pressure Fault
(ClimaDry) Code 11

XXGreen Status LED Off

X Reduced or no water fl ow in cooling
X Water Temperature out of range in cooling Bring water temp within design parameters.

X Reduced or no air fl ow in heating

X Air temperature out of range in heating Bring return air temp within design parameters.
XXOvercharged with refrigerant Check superheat/subcooling vs typical operating condition table.
XXBad HP Switch Check switch continuity and operation. Replace.
XXInsuffi cient charge Check for refrigerant leaks

X Compressor pump down at start-up Check charge and start-up water fl ow.

X Reduced or no water fl ow in heating

X Inadequate antifreeze level Check antifreeze density with hydrometer.

Improper temperature limit setting (30°F vs

X

10°F [-1°C vs -2°C])

X Water Temperature out of range Bring water temp within design parameters.
XXBad thermistor Check temp and impedance correlation per chart

X Reduced or no air fl ow in cooling

X Air Temperature out of range Too much cold vent air? Bring entering air temp within design parameters.

Improper temperature limit setting (30°F vs

X

10°F [-1°C vs -12°C])

XXBad thermistor Check temp and impedance correlation per chart.
XXBlocked drain Check for blockage and clean drain.
XXImproper trap Check trap dimensions and location ahead of vent.

X Poor drainage

X Moisture on sensor Check for moisture shorting to air coil.
XXPlugged air fi lter Replace air fi lter .
xXRestricted Return Air Flow Find and eliminate restriction. Increase return duct and/or grille size.

XXUnder Voltage

XXOver Voltage
X Heating mode LT2>125°F [52°C] Check for poor air fl ow or overcharged unit.

Cooling Mode LT1>125°F [52°C] OR LT2<

X

40ºF [4ºC])

XXLT1 and LT2 swapped Reverse position of thermistors

XX

Blower does not operate

Blower operating with incorrect airfl ow

X

Reduced or no air fl ow in cooling or ClimaDry

Air temperature out of range Too much cold vent air - bring entering air temp within design parameters
Bad pressure switch Check switch continuity and operation - replace

Check for line voltage between L1 and L2 on the contactor.
Check for 24VAC between R and C on CXM/DXM'
Check primary/secondary voltage on transformer.
Check pump operation or valve operation/setting.
Check water fl ow adjust to proper fl ow rate.

Check for dirty air fi lter and clean or replace.
Check fan motor operation and airfl ow restrictions.
Dirty Air Coil- construction dust etc.
Too high of external static. Check static vs blower table.

Check pump operation or water valve operation/setting.
Plugged strainer or fi lter. Clean or replace..
Check water fl ow adjust to proper fl ow rate.

Clip JW3 jumper for antifreeze (10°F [-12°C]) use.

Check for dirty air fi lter and clean or replace.
Check fan motor operation and airfl ow restrictions.
Too high of external static. Check static vs blower table.

Normal airside applications will require 30°F [-1°C] only.

Check for piping slope away from unit.
Check slope of unit toward outlet.
Poor venting. Check vent location.

Check power supply and 24VAC voltage before and during operation.
Check power supply wire size.
Check compressor starting. Need hard start kit?
Check 24VAC and unit transformer tap for correct power supply voltage.
Check power supply voltage and 24VAC before and during operation.
Check 24VAC and unit transformer tap for correct power supply voltage.

Check for poor water fl ow, or air fl ow.

Check blower line voltage
Check blower low voltage wiring
Wrong unit size selection
Wrong unit family selection
Wrong motor size
Incorrect blower selection
Check for dirty air fi lter and clean or replace
Check fan motor operation and airfl ow restrictions
Too high of external static - check static vs blower table

Tranquility

Functional Troubleshooting

®

30 Digital (TE)

Rev.: January 30, 2019

climatemaster.com

57

CLIMATEMASTER WATER-SOURCE HEAT PUMPS

Tranquility

®

30 Digital (TE)

Rev.: January 30, 2019

Functional Troubleshooting (cont.)

Fault Htg Clg Possible Cause Solution

Low Air Coil Temperature
Fault - (ClimaDry) Code 12

ESD - ERV Fault (DXM Only)
Green Status LED Code 3

No Fault Code Shown

Unit Short Cycles

Only Fan Runs

X

Reduced airfl ow in cooling, ClimaDry, or
constant fan

Air temperature out of range Too much cold vent air - bring entering air temp within design parameters
Bad thermistor Check temp and impedance correlation per chart

XXERV unit has fault (Rooftop units only) Troubleshoot ERV unit fault

No compressor operation See ‘Only Fan Operates’

XX

Compressor overload Check and replace if necessary
Control board Reset power and check operation

Dirty air fi lter Check and clean air fi lter
Unit in ‘Test Mode’ Reset power or wait 20 minutes for auto exit

XX

Unit selection Unit may be oversized for space - check sizing for actual load of space
Compressor overload Check and replace if necessary
Thermostat position Ensure thermostat set for heating or cooling operation
Unit locked out Check for lockout codes - reset power

XX

Compressor overload Check compressor overload - replace if necessary
Thermostat wiring

Check for dirty air fi lter and clean or replace
Check fan motor operation and airfl ow restrictions
Too high of external static - check static vs blower table

Check thermostat wiring at DXM2 - put in Test Mode and jumper Y1 and R to
give call for compressor

58

ClimateMaster Water-Source Heat Pumps

THE SMART SOLUTION FOR ENERGY EFFICIENCY

Symptom Htg Clg Possible Cause Solution

Insufficient Capacity/

X X Dirty filter Replace or clean

Not Cooling or Heating

Reduced or no air flow

Check for dirty air filter and clean or replace

Properly

in heating

Check fan motor operation and airflow restrictions
Too high of external static - check static vs blower table

Reduced or no air flow

Check for dirty air filter and clean or replace

in cooling

Check fan motor operation and airflow restrictions
Too high of external static - check static vs blower table

X X Leaky duct work

Check supply and return air temperatures at the unit and at
distant duct registers if significantly different, duct leaks

are present
X X Low refrigerant charge Check superheat and subcooling per chart
X X Restricted metering device Check superheat and subcooling per chart - replace

X Defective reversing valve Perform RV touch test

X X Thermostat improperly located Check location and for air drafts behind stat
X X Unit undersized

Recheck loads & sizing check sensible cooling load and

heat

pump capacity

X X Scaling in water heat exchanger Perform Scaling check and clean if necessary

X X Inlet water too hot or cold Check load, loop sizing, loop backfill, ground moisture

High Head Pressure

X

Reduced or no air flow

Check for dirty air filter and clean or replace

in heating

Check fan motor operation and airflow restrictions

Too high of external static - check static vs blower table

X Reduced or no water flow Check pump operation or valve operation/setting

in cooling

Check water flow adjust to proper flow rate

X Inlet water too hot Check load, loop sizing, loop backfill, ground moisture

X

Air temperature out of range in
heating

Bring return air temp within design parameters

X Scaling in water heat exchanger Perform Scaling check and clean if necessary
X X Unit over charged Check superheat and subcooling - reweigh in charge
X X Non-condensables insystem Vacuum system and reweigh in charge
X X Restricted metering device Check superheat and subcooling per chart - replace

Low Suction Pressure

X

Reduced water flow

Check pump operation or water valve operation/setting

in heating

Plugged strainer or filter - clean or replace
Check water flow adjust to proper flow rate

X Water temperature out of range Bring water temp within design parameters

X

Reduced air flow

Check for dirty air filter and clean or replace

in cooling

Check fan motor operation and airflow restrictions
Too high of external static - check static vs blower table

X Air temperature out of range

Too much cold vent air - bring entering air temp within
design parameters

X X Insufficient charge Check for refrigerant leaks

X

X

S

n

e

glg

m

f

ficient Capacity/

g

y

Pr

r

ympto

nsu

Not Cooling or Heatin

t

Possible Caus

olutio

Tranquility

®

30 Digital (TE)

Rev.: January 30, 2019

Performance Troubleshooting

Head

Low Suction Pr

u

climatemaster.com

59

CLIMATEMASTER WATER-SOURCE HEAT PUMPS

Low Dischage Air
Temperature in Heating

X Too high of air flow Check fan motor speed selection and airflow chart
X Poor performance See “Insufficient Capacity”

High Humidity

X Too high of air flow Check fan motor speed selection and airflow chart

X Unit oversized

Only Compressor Runs

X X Thermostat wiring

Check G wiring at heat pump. Jumper G and R for fan
operation.

X X Fan motor relay

Jumper G and R for fan operation. Check for Line voltage
across blower relay contacts.

Check fan power enable relay operation (if present)

X X Fan motor Check for line voltage at motor. Check capacitor

X X Thermostat wiring

Check thermostat wiring at or DXM2. Put in Test Mode
and then jumper Y1 and W1 to R to give call for fan,
compressor and electric heat.

Unit Doesn't Operate in
Cooling

X Reversing Valve

Set for cooling demand and check 24VAC on RV coil.
If RV is stuck, run high pressure up by reducing water flow

and while operating engage and disengage RV coil voltage
to push valve.

X Thermostat setup

X Thermostat wiring

Check O wiring at heat pump. DXM2 requires call for
compressor to get RV coil “Click.”

Modulating Valve
Troubleshooting

X

Improper output setting

Verify the AO-2 jumper is in the 0-10V position

No valve operation

Check voltage to the valve

X

No valve output signal

Check DC voltage between AO2 and GND. Should be O
when valve is off and between 3.3v and 10v when valve
is on.

Replace valve if voltage and control signals are present at
the valve and it does not operate

For DXM2 check for “O” RV setup not “B”.

Air

g

idity

r

s

n

g

Recheck loads & sizing check sensible cooling load and
heat

pump capacity

Symptom Htg Clg Possible Cause Solution

n

e

glg

m

Tranquility

Rev.: January 30, 2019

®

30 Digital (TE)

Performance Troubleshooting (continued)

ympto

ow Dischage

Temperature in Heatin

Hum

nly Comp

Unit Doesn't Operate in

ooli

r Run

t

Possible Caus

olutio

odulating Valve

roubleshootin

60

ClimateMaster Water-Source Heat Pumps

THE SMART SOLUTION FOR ENERGY EFFICIENCY

Tranquility

®

30 Digital (TE)

Rev.: January 30, 2019

Start-Up Log Sheet

Installer: Complete unit and system checkout and follow unit start-up procedures in the IOM. Use this form to record
unit information, temperatures and pressures during start-up. Keep this form for future reference.

Job Name: Street Address:

Model Number: Serial Number:

Unit Location in Building:

Date: Sales Order No:

In order to minimize troubleshooting and costly system failures, complete the following checks and data entries before
the system is put into full operation.

Fan Motor: CFM Settings (ECM)
Temperatures: F or C Antifreeze: %
Pressures: PSIG or kPa Type

Cooling Mode Heating Mode

Entering Fluid Temperature
Leaving Fluid Temperature
Temperature Differential
Return-Air Temperature DB WB DB
Supply-Air Temperature DB WB DB
Temperature Differential

Water Coil Heat Exchanger
(Water Pressure IN)

Water Coil Heat Exchanger
(Water Pressure OUT)

Pressure Differential
Water Flow GPM

Compressor

Amps
Volts
Discharge Line Temperature

Motor

Amps
Volts

Allow unit to run 15 minutes in each mode before taking data.

Note: Never connect refrigerant gauges during startup procedures. Conduct water-side analysis using P/T
ports to determine water flow and temperature difference. If water-side analysis shows poor performance,
refrigerant troubleshooting may be required. Connect refrigerant gauges as a last resort.

climatemaster.com

61

CLIMATEMASTER WATER-SOURCE HEAT PUMPS

s

Tranquility

Rev.: January 30, 2019

®

30 Digital (TE)

Functional Troubleshooting

Refrigerant Circuit Diagram

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Note: Never connect refrigerant gauges during startup procedures. Conduct water-side analysis using P/T
ports to determine water flow and temperature difference. If water-side analysis shows poor performance,
refrigerant troubleshooting may be required. Connect refrigerant gauges as a last resort.

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62

ClimateMaster Water-Source Heat Pumps