Tranquility
®
22 (TZ) Series
R e v. : A u g u s t 4 , 2 0 2 1
C l i m a t e M a s t e r Wa t e r-S o u rc e H e a t P u m p s
52
C L I M AT E M A S T E R WAT E R - S O U R C E H E AT P U M P S
Functional Troubleshooting, Cont’d.
Fault
Htg Clg Possible Cause
Solution
Low Air Coil Pressure
Fault
(ClimaDry) Code 11
X
Reduced or no air flow in cooling or
ClimaDry
Check for dirty air filter and clean or replace
Check fan motor operation and airflow restrictions
Too high of external static - check static vs blower table
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
Low Air Coil Temperature
Fault -
(ClimaDry) Code 12
X
Reduced airflow in cooling, ClimaDry, or
constant fan
Check for dirty air filter and clean or replace
Check fan motor operation and airflow restrictions
Too high of external static - check static vs blower table
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
ESD - ERV Fault (DXM
Only)
Green Status LED Code 3
X
X
ERV unit has fault (Rooftop units only)
Troubleshoot ERV unit fault
No Fault Code Shown
X
X
No compressor operation
See ‘Only Fan Operates’
Compressor overload
Check and replace if necessary
Control board
Reset power and check operation
Unit Short Cycles
X
X
Dirty air filter
Check and clean air filter
Unit in ‘Test Mode’
Reset power or wait 20 minutes for auto exit
Unit selection
Unit may be oversized for space - check sizing for actual load of space
Compressor overload
Check and replace if necessary
Only Fan Runs
X
X
Thermostat position
Ensure thermostat set for heating or cooling operation
Unit locked out
Check for lockout codes - reset power
Compressor overload
Check compressor overload - replace if necessary
Thermostat wiring
Check thermostat wiring at DXM2 - put in Test Mode and jumper Y1 and
R to give call for compressor
