ClimateMaster TYH/V 024 - 060 60Hz - HFC-410A Manuel de service télécharger pdf (Page 54)

Geothermal Heat Pump Systems

Tranquility

22 Digital (TZ) Series IOM - 60Hz HFC-410A

Rev.: 17 Jan., 2013B

Functional Troubleshooting

Fault Htg Clg Possible Cause Solution

Main Power Problems

X X Green status LED off

Check Line Voltage circuit breaker and disconnect

Check for line voltage between L1 and L2 on the contactor

Check for 24VAC between R and C on DXM

Check primary/secondary voltage on transformer

HP Fault Code 2

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

in cooling

Check water flow adjust to proper flow rate

Water t emperature out of range in

cooling

Bring water temp within design parameters

Reduced or no air flow

Check for dirty air filter and clean or replace

in heating

Check fan motor operation and airflow restrictions

Dirty air coil- construction dust etc.

Too high of external static. Check static vs blower table

Air t emperature out of range in

heating

Bring return air temp within design parameters

Overcharged with refrigerant

Check superheat/subcooling vs typical operating condition

table

Bad HP switch Check switch continuity and operation - Replace

LP/LOC Fault-Code 3

X X Insufficient charge Check for refrigerant leaks

Low Pressure/Loss of Charge X

Compressor pump down at start-

Check charge and start-up water flow

LT1 Fault - Code 4

Reduced or no water flow

Check pump operation or water valve operation/setting

Water Low Temperature

in heating

Plugged strainer or filter - clean or replace

Check water flow adjust to proper flow rate

X Inadequate anti-freeze level Check antifreeze density with hydrometer

Improper low temperature setting

(30°F vs 10°F)

Clip LT1 jumper for antifreeze (10°F) use

X Water t emperature out of range

Bring water temp within design parameters

X X Bad thermistor Check temp and impedance correlation per chart

LT2 Fault - Code 5

Low Air Temperature

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 Air temperature out of range

Too much cold vent air - bring entering air temp within

design parameters

Improper low temperature setting

(30°F vs 10°F)

Normal airside applications will require 30°F only

X X Bad thermistor Check temp and impedance correlation per chart

Condensate Fault-Code

High Condensate Level

X X Blocked drain Check for blockage and clean drain

X X Improper trap Check trap dimensions and location ahead of vent

X Poor drainage

Check for piping slope away from unit

Check slope of unit toward outlet

Poor venting - check vent location

X Moisture on sensor Check for moisture shorting to air coil

Over/Under Voltage-Code 7

X X Under voltage

Check power supply and 24VAC voltage before and during

operation

(Auto Resetting)

Check power supply wire size

Check compressor starting. Need hard start kit?

Check 24VAC and unit transformer tap for correct power

supply voltage

X X Over voltage

Check power supply voltage and 24VAC before and during

operation.

Check 24VAC and unit transformer tap for correct power

supply voltage

Plugged air filter

X X Restricted return air flow

Replace air filter

Find and eliminate rectriction - increase return duct

and/or grille size

High Pressure

X Frozen water heat exchanger Thaw heat exchanger

X X Bad HPWS Switch Replace HPWS Switch

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ClimateMaster TYH/V 024 - 060 60Hz - HFC-410A Manuel de service Page 54

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