Use and Care Manual

EN
©2021 Hestan Commercial Corporation
14
TROUBLESHOOTING
If the unit appears to be malfunctioning, read through the OPERATION section of this manual first.
If the problem persists, check this troubleshooting section to see if you can refer to the cause and
remedy of the problem and resolve it without a service call.
Never attempt to repair or perform maintenance on the unit until the main electrical power has been
disconnected!
DANGER
RISK OF FIRE OR EXPLOSION - FLAMMABLE REFRIGERANT USED. Consult repair manual/
owners guide before attempting to service this product. All safety precautions must be followed. To
be repaired by trained service personnel only. Do not puncture refrigerant tubing.
Problem Cause Solution
No interior light. LED board is inoperable. Contact Hestan Customer Care.
Light stays on when door switch
is closed.
Manual light switch is on. Turn manual light switch off.
Door is not making contact with the
door switch.
Make sure the door closes tightly.
Noisy operation.
Soft sounds from compressor, fan
motor and valves heard.
Normal operation.
“Crackling” sound during defrost. Normal operation.
LED Controller display is
flashing ”P1”
Thermostat probe has failed. Contact Hestan Customer Care.
LED Controller display is
flashing ”P2”
Evaporator probe has failed. Contact Hestan Customer Care.
LED Controller display is
flashing ”HA”
Internal compartment has exceeded
the high temperature alarm preset
value for over 30 minutes.
* Make sure the door is completely closed.
* Check the door gasket seal. Replace if
necessary.
* Check the condenser and clean it if
necessary.
* Make sure the louvered plate is
unobstructed. If surrounding ambient
temperature has recently changed
dramatically, the compartment may be
affected.
* Make sure the interior light is off.
* Warm product was recently placed in the
cabinet. Wait 24 hours for the product to chill
and then recheck the temperature.
LED Controller display is
flashing ”LA”
Internal compartment has exceeded
the low temperature alarm preset value
for over 30 minutes.
* Make sure the door is completely closed.
* Check the door gasket seal. Replace if
necessary.
* If the surrounding ambient temperature
has recently changed dramatically, the
compartment temperature may be affected.
LED Controller display is
flashing ”dA”
Door is open. * Make sure the door is completely closed.
Unit is not running.
No power is going to the unit.
* Home circuit breaker was tripped. Reset the
circuit breaker.
* ON/OFF keypad is turned off. Turn it on.
* If it is a Dual-Zone model, check the
DualZone power switch (see page 7).
Condenser is dirty. Clean the condenser.