Enertech Global, LLC
32
WS Rev. E Models
Installation and Operations Manual
E: NOISY BLOWER AND LOW AIR FLOW
Noisy Blower
Blower wheel contacting housing—Readjust, Foreign material inside housing—Clean housing.
Loose duct work—Secure properly.
Low air flow
Check speed setting, check nameplate or data manual for proper speed, and correct speed setting.
Check for dirty air filter—Clean or replace; obstruction in system—Visually check.
Balancing dampers closed, registers closed, leaks in ductwork. Repair.
Ductwork too small. Resize ductwork.
F: NO WATER FLOW
Pump Module
Make sure Pump Module is connected to the control box relay (check all electrical connections). For non-pressurized
systems, check water level in Pump Module. If full of water, check pump. Close valve on the pump flanges and
loosen pump. Take off pump and see if there is an obstruction in the pump. If pump is defective, replace. For
pressurized systems, check loop pressure. Repressurize if necessary. May require re-flushing if there is air in the
loop.
Solenoid valve
Make sure solenoid valve is connected. Check solenoid. If defective, replace.
G: IN HEATING OR COOLING MODE, UNIT OUTPUT IS LOW
Water
Water flow & temperature insufficient.
Airflow
Check speed setting, check nameplate or data manual for proper speed, and correct speed setting.
Check for dirty air filter—Clean or replace.
Restricted or leaky ductwork. Repair.
Refrigerant charge
Refrigerant charge low, causing inefficient operation. Make adjustments only after airflow and water flow are
checked.
Reversing valve
Defective reversing valve can create bypass of refrigerant to suction side of compressor. Switch reversing valve to
heating and cooling mode rapidly. If problem is not resolved, replace valve. Wrap the valve with a wet cloth and
direct the heat away from the valve. Excessive heat can damage the valve. Always use dry nitrogen when brazing.
Replace filter/drier any time the circuit is opened.
Heat pump will not cool but will
heat. Heat pump will not heat
but will cool.
Reversing valve does not shift. Check reversing valve wiring. If wired wrong, correct wiring. If reversing valve is stuck,
replace valve. Wrap the valve with a wet cloth and direct the heat away from the valve. Excessive heat can damage
the valve. Always use dry nitrogen when brazing. Replace filter/drier any time the circuit is opened.
Water heat exchanger
Check for high-pressure drop, or low temperature drop across the coil. It could be scaled. If scaled, clean with
condenser coil cleaner.
System undersized
Recalculate conditioning load.
H: WATER HEAT EXCHANGER FREEZES IN HEATING MODE
Water flow
Low water flow. Increase flow. See F. No water flow.
Flow Switch
Check switch. If defective, replace.
I: EXCESSIVE HEAD PRESSURE IN COOLING MODE
Inadequate water flow
Low water flow, increase flow.
J: EXCESSIVE HEAD PRESSURE IN HEATING MODE
Low air flow
See E: Noisy blower and low air flow.
K: AIR COIL FREEZES OVER IN COOLING MODE
Air flow
See E: Noisy blower and low air flow.
Blower motor
Motor not running or running too slow. Motor tripping off on overload. Check for overheated blower motor and
tripped overload. Replace motor if defective.
Panels
Panels not in place.
Low air flow
See E: Noisy blower and low air flow.
L: WATER DRIPPING FROM UNIT
Unit not level
Level unit.
Condensation drain line plugged
Unplug condensation line.
Water sucking off the air coil in
cooling mode
Too much airflow. Duct work not completely installed. If duct work is not completely installed, finish duct work.
Check static pressure and compare with air flow chart in spec manual under specific models section. If ductwork is
completely installed it may be necessary to reduce CFM.
Water sucking out of the
drain pan
Install an EZ-Trap or P-Trap on the drain outlet so blower cannot suck air back through the drain outlet.
Troubleshooting Tips
Section 12: Troubleshooting