ClimateMaster Tranquility Digital - Page 20

Troubleshooting Guide - Tranquility
®
Digital (DXM2) Packaged Units
Rev.: 01/15/14
20
Geothermal Heat Pump Systems
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
Z\WWS`]VS[HNL:LL(>
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
Unit Performance
Sentinel-Code 8
X Heating Mode LT2>125°F *OLJRMVYWVVYHPYÅV^VYV]LYcharged unit
X
Cooling Mode LT1>125°F OR
LT2< 40°F
*OLJRMVYWVVY^H[LYÅV^VYHPYÅV^
Swapped Thermistor
Code 9
X X LT1 and LT2 swapped Reverse position of thermistors
ECM Fault -
Code 10
X X Blower does not operate
*OLJRISV^LYSPUL]VS[HNL:LL)0
Check blower low voltage wiring
Blower operating with incorrect
HPYÅV^
Wrong unit size selection
Wrong unit family selection
Wrong motor size
Incorrect blower selection
Low Air Coil
Pressure Fault
(ClimaDry) Code 11
X 9LK\JLKVYUVHPYÅV^PUJVVSPUN
or ClimaDry
Low Air Coil
Temperature Fault -
(ClimaDry) Code 12
X 9LK\JLKHPYÅV^PUJVVSPUN
ClimaDry, or constant fan
Air temperature out of range
Check switch continuity and operation - replaceBad pressure switch
Air temperature out of range
Bad thermistor Check temp and impedance correlation per chart
*OLJRMVYKPY[`HPYÄS[LYHUKJSLHUVYYeplace
*OLJRMHUTV[VYVWLYH[PVUHUKHPYÅV^Yestrictions
Too high of external static - check static vs blower table
Too much cold vent air - bring entering air temp within
design parameters
*OLJRMVYKPY[`HPYÄS[LYHUKJSLHUVYYeplace
*OLJRMHUTV[VYVWLYH[PVUHUKHPYÅV^Yestrictions
Too high of external static - check static vs blower table
Too much cold vent air - bring entering air temp within
design parameters
Fault Htg Clg Possible Cause Solution
Functional Troubleshooting
A-F
A-F