CLIMATEMASTER WATER-SOURCE HEAT PUMPS
Tranquility
®
(TRL) Series
R e v. : N o v e m b e r 1 1 , 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
64
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
CXM2.
Check primary/secondary voltage on
transformer.
HP Fault
Code 2
High Pressure
X
Reduced or no water flow
in cooling
Check pump operation or valve operation/
setting.
Check water flow adjust to proper flow rate.
Check flow switch is operating correctly.
X
Water Temperature out of
range in cooling
Bring water temp within design parameters.
X
Reduced or no air flow in
heating
Check for dirty air filter and clean or replace.
Check flow switch is operating correctly.
Check fan motor operation and airflow
restrictions.
Dirty Air Coil- construction dust etc.
Too high of external static. Check static vs
blower table.
Confirm wire harness connection to correct
taps.
X
Air temperature out of range
in heating
Bring return air temp within design
parameters.
X
X
Overcharged with refrigerant
Check superheat/subcooling vs typical
operating condition table.
X
X
Bad HP Switch
Check switch continuity and operation.
Replace. Confirm wire harness connection to
correct taps.
LP/LOC Fault
Code 3
Low Pressure /
Loss of Charge
X
X
Insufficient charge
Check for refrigerant leaks.
X
X
Bad LP switch
Check switch continuity and operation.
Replace.
Check if JW3 is cut on CXM2 to avoid
system looking for the incorrect LP switch.
X
Compressor pump down at
start-up
Check charge and start-up water flow.
LT1 Fault
Code 4
Water coil low
temperature limit
X
Reduced or no water flow
in heating
Check pump operation or water valve
operation/setting.
Plugged strainer or filter. Clean or replace.
Check water flow adjust to proper flow rate.
Check flow switch is operating correctly.
X
Inadequate antifreeze level
Check antifreeze density with hydrometer.
X
Improper temperature limit
setting (25°F vs 10°F [-4°C
vs -12°C])
Clip JW3 jumper for antifreeze (10°F [-12°C])
use. Check flow switch is operating correctly.
X
Water Temperature out of
range
Bring water temp within design parameters.
X
X
Bad thermistor
Check temp and impedance correlation per
chart.
Table continued on next page.