21
S U B - Z E R O
T R O U B L E S H O OT I N G
G U I D E
T R O U B L E S H O OT I N G
G U I D E
P R O B L E M
P O S S I B L E C A U S E
P O S S I B L E S O L U T I O N
Unit operates
Ice may be stuck in the evaporator
Check water supply – filter may
but no ice falling in
and the unit is ”frozen up”
be restricted
storage bin
Check inlet water valve – inlet screen
may be restricted or valve does not
operate
Hot gas valve may not operate –
check and repair or replace
Harvest time set too short – timer
needs adjustment (see page 19)
Too much heat load
Inlet water valve leaks through,
must be replaced
No water spray
Water pump does not operate, must
be replaced or check for water
leak in reservoir
No airflow
Fan motor does not operate or fan
blade is broken, must be replaced
Condenser completely blocked,
must be cleaned (see page 17)
Cube size control will not close
Defective control, must be replaced
Inlet water valve leaks through,
must be replaced or not enough
refrigerant, call a Sub-Zero
authorized service center
Compressor does not operate
Start relay or capacitor must be
properly or at all
replaced
Call a Sub-Zero authorized service
center
Not enough refrigerant
Call a Sub-Zero authorized service
center
Restricted system
Call a Sub-Zero authorized service
center
Hot gas valve leaks through
Call a Sub-Zero authorized service
center
