ClimateMaster Tranquility Digital - Functional Troubleshooting Guide

19
Troubleshooting Guide - Tranquility
®
Digital (DXM2) Packaged Units
Rev.: 01/15/14
Functional Troubleshooting
Fault Htg Clg Possible Cause Solution
Main Power Problems
X X Green status LED off
Check Line Voltage circuit breaker and disconnect
between 197-254 volts
Check for line voltage between L1 and L2 on the contactor
Check for 24VAC between R and C on DXM 18-31.5
Check primary/secondary voltage on transformer
HP Fault Code 2
X 9LK\JLKVYUV^H[LYÅV^ Check pump operation or valve operation/setting
in cooling
*OLJR^H[LYÅV^HKQ\Z[[VWYVWLYÅV^YH[L
X
Water temperature out of range in
cooling
Bring water temp within design parameters.
Water is too warm.
X
9LK\JLKVYUVHPYÅV^
*OLJRMVYKPY[`HPYÄS[LYHUKJSLHUVYYeplace
in heating
*OLJRMHUTV[VYVWLYH[PVUHUKHPYÅV^Yestrictions
Dirty air coil- construction dust etc.
Too high of external static. Check static vs blower table
X
Air temperature out of range in
heating
Bring return air temp within design parameters
XX
Overcharged with refrigerant
Check superheat/subcooling vs typical operating condition
table
XX
Bad HP switch Check switch continuity and operation - Replace
LP/LOC Fault-Code 3
X X InsufÄJPLU[JOHYge Check for refrigerant leaks
Low Pressure/
Loss of Charge
X
Compressor pump down at start-
up
Check charNLHUKZ[HY[\W^H[LYÅV^
LT1 Fault - Code 4
X
9LK\JLKVYUV^H[LYÅV^
Check pump operation or water valve operation/setting
Water Low Temperature
in heating
7S\NNLKZ[YHPULYVYÄS[LY - clean or replace
*OLJR^H[LYÅV^HKQ\Z[[VWYVWLYÅV^YH[L
X Inadequate anti-freeze level *OLJRHU[PMYLLaLZWLJPÄJNYH]P[`^P[OO`KYVTL[LY:LL(9
X
Improper low temperature setting
(30°F vs 10°F)
*SPW1>3;Q\TWLYMVYHU[PMYLLaL\ZL)LZ\YLSVVW
has 15º freeze protection
X Water temperature 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
X
9LK\JLKVYUVHPYÅV^
*OLJRMVYKPY[`HPYÄS[LYHUKJSLHUVYYeplace
in cooling
*OLJRMHUTV[VYVWLYH[PVUHUKHPYÅV^Yestrictions
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
KLZPNUWHYHTL[LYZ[OH[064ZWLJPÄLZ
X
Improper low temperature setting
(30°F vs 10°F)
Normal airside applications will require. Only setting for
packaged units is 30º.
X X Bad thermistor Check temp and impedance correlation per chart
Condensate Fault -
Code 6 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
XX
7S\NNLKHPYÄS[LY
XX9LZ[YPJ[LKYL[\YUHPYÅV^
9LWSHJLHPYÄS[LY
Find and eliminate rectriction - increase return duct and/or
NYPSSLZPaL*OLJRZ[H[PJWYLZZ\YL:LL[OLKPHNYHTVU)+
High Pressure
X Frozen water heat exchanger Thaw heat exchanger (water pressure switches).
XX)HK/7>::^P[JO 9LWSHJL/7>::^P[JO:LL)(
A-F
A-F
208-240