EMI WLHA - Manual (Page 34)

www.enviromaster.com WLCA/WLHA High Wall Evaporator 34
troUBLEsHootinG proCEdUrE Continued
to prevent freeze up from occurring. If
freeze up does occur then check the
following.
• Check that the freeze sensor located
in the lowest part of the coil. Generally
this is where freeze up will begin.
• Check that the freeze sensor inserted
fully and snug in the coil fin. If not
another location may need to be
selected. Be careful not to insert the
sensor directly into the coil tube rather
insert the sensor between two tubes.
• Check the indoor air filter. It should
be clean and free of dirt. A dirty filter
will reduce airflow and efficiency.
Also check that the coil is clean.
If the coil is dirty then it should be
cleaned using an appropriate coil
cleaner or mild detergent.
frequently Asked questions Continued
• Is the equipment being operated
in cooling mode when outdoor
temperatures are below 60°F? If it
is, then the condenser should be
fitted with low ambient control so
that the proper system pressures
are maintained.
• Does the system have the proper
refrigerant charge? A system low
on refrigerant can cause evaporator
freeze-up. To check system charge
you will need to contact a qualified
refrigeration service technician.
Refrigerant charge information can
be found in IOM for the outdoor
condensing unit.