Enertech Global, LLC
31
WS Rev. E Models
Installation and Operations Manual
Troubleshooting Tips
A: UNIT WILL NOT START IN EITHER CYCLE
Thermostat
Set thermostat on heating and highest temperature setting. Unit should run. Set thermostat on cooling and lowest
temperature setting. Unit should run. Set fan to On position. Fan should run. If unit does not run in any position,
disconnect wires at heat pump terminal block and jump R, G, Y. Unit should run in heating. If unit runs, replace
thermostat with correct thermostat only.
Loose or Broken Wires
Tighten or replace wires.
Blown Fuse/
Check fuse size, replace fuse or reset circuit breaker.
Check low voltage circuit breaker.
Tripped Circuit Breakers
Check fuse size, replace fuse or reset circuit breaker.
Low Voltage Circuit
Check 24 volt transformer. If burned out or less than 24 volt, replace. Before replacing, verify tap setting and correct
if necessary.
B: BLOWER RUNS BUT COMPRESSOR WILL NOT START (COMPRESSOR OVERLOAD, BAD CAPACITOR, HP FAULT)
Logic Board
Check if status light is on and logic board is working properly. Check fault lights. See LED Identification chart in
Controls Section
Defective Sensors
Check status/fault lights. Sensor is out of normal range for resistance values, open, or shorted. Compare sensor
resistance values with the charted resistance in Controls Section
Defective Capacitor
Check capacitor. If defective, replace.
Failed Compressor
See charts M and N for compressor diagnostic. If compressor still doesn’t run, replace it.
Low Pressure Switch
Low refrigerant charge. Check for pressure. Check for leaks.
C: BLOWER RUNS BUT COMPRESSOR SHORT CYCLES OR DOES NOT RUN
Wiring
Loose or broken wires. Tighten or replace wires. See A: Unit will not start in either cycle.
Blown Fuse
Check fuse size. Check unit nameplate for correct sizing. Replace fuse or reset circuit breaker.
Check low voltage circuit breaker.
Temporarily bypass flow switch for a couple seconds. If compressor runs properly, check switch. If defective, replace.
If switch is not defective, check for air in loop system. Make sure loop system is properly purged. Verify flow rate
before changing switch. .
Defective Sensors
Check status/fault lights. Sensor is out of normal range for resistance values, open, or shorted. Compare sensor
resistance values with the charted resistance in Controls Section
Water Flow (Source Heat
Exchanger Freeze Fault)
Check status/fault lights. To check water flow remove the FS jumper (see Controls Section for location) and jumper
the two FS terminals (located between blue and violet wires on the right side of the board) together to complete the
flow switch circuit. Determine if the required water pressure drop is present. If required pressure drop is present,
check the resistance of T4 source sensor (15°F=41.39kΩ; 30°F=28.61kΩ) and temperature of the refrigerant line
between the source heat exchanger and TXV.
High or Low
Pressure Switches
If heat pump is out on high or low-pressure cutout (lockout), check for faulty switches by jumping the high and
low-pressure switches individually. If defective replace. Check airflow, filters, water flow, refrigerant pressures, and
ambient temperature. WARNING: Only allow compressor to run for a couple of seconds with the high pressure
switch jumped.
Defective Logic Board Relay
Jump R to Y directly on lockout board. Check for 24V at Y. If no operation and no faults occur, replace lockout board.
Hot Gas Temperature>220°F
Check status/fault lights. Check hot gas/discharge line temperature with a thermocouple type thermometer.
WARNING: Let the unit remain off for several minutes and touch the thermocouple to the discharge line to check if it
is cooled enough to strap/tape a thermocouple to it. Check the discharge line temperature during the next operation
cycle to compare the temperature to the lockout temperature of 220°F. Check water/air flow. If water/air flow is
present, check the refrigerant pressures.
Condensate Overflow (CO)
Check status/fault lights. Check sensors for contact with water, debris, or a loose sensor touching metal. Clean
sensors if contacting debris. Flush drain lines if the drain pan is full. If no debris is present and drain pan is empty,
remove violet wire from CO terminal on lockout board (lower right). If CO lockout occurs with violet wire removed
replace the lockout board.
Over/Under Voltage
Make sure secondary/low voltage is between 20V and 29V. Check the transformer’s primary connections for the
correct voltage (Orange & Black = 230V; Red & Black = 208V). Correct any possible voltage drops in the main voltage.
Load Heat Exchanger Frozen
Check status/fault lights. Check for reduced air flow due to dirty filter, obstructions, or poor blower performance.
Check T1 sensor for the proper resistance (30°F = 28.61kΩ).
D: UNIT RUNNING NORMAL, BUT SPACE TEMPERATURE IS UNSTABLE
Thermostat
Thermostat is getting a draft of cold or warm air. Make sure that the wall or hole used to run thermostat wire from
the ceiling or basement is sealed, so no draft can come to the thermostat.
Faulty Thermostat (Replace).
Section 12: Troubleshooting