NG DP
TECHNICAL SERVICE MANUAL
27
5)
Ice cubes form correctly but do
not unstick.
A)
Faulty hot gas valve or wrongly
connected.
A)
Verify and change if necessary.
B)
Low water pressure.
B)
Increase water pressure if possible.
(This can often be done by removing
flowmeter on faucet).
C)
Fan
pressure switch or
condensation pressure switch
too low or faulty.
C) Adjust or replace.
D) Faulty condensation water inlet valve
(water
cooled
machines
without
pressure switch water valve)
D) Check and replace.
E) Faulty water pressure switch valve or
too open (water cooled machines
with this valve)
E)
Adjust, repair or replace.
F)
Room or water temperature below
7ºC.
F)
Increase the defrost time.
G) Faulty timer or micros.
G) Check and replace if necessary.
H) Production time too long. The cubes
have flash outside the mold.
H) Adjust by reducing time to the cycle
thermostat.
I)
Dirty water inlet filters.
I)
Clean filters.
6)
Low ice production.
A) Blocked condenser or air access to
condenser.
A) Clean condenser; improve air circulation
by lifting machine from floor and moving
away from walls and hot air sources .
B)
In
water-cooled
machines:
dirty condenser, badly adjusted
valve,
pressure switch t, faulty water inlet
valve or faulty pressostatic valve.
B) Clean condenser; check, adjust or
replace.
C) Faulty hot gas valve,
doesn’t close
totally.
C) Replace.
D)
Faulty fan or pressure switch, faulty
inlet cooling water valve.
D) Check fan and re-adjust pressure
switch t or replace.
E) Refrigerant charge too high or too low.
E) Adjust.
F) Faulty water inlet valve: leaks and does
not close fully.
F) Check and replace.
G) Inefficient compressor.
G) Replace.
7) Ice cube are so large that they
stick together and form a plate of
ice
A)
Start of cycle thermostat adjusted too
low or faulty.
A)
Adjust and/or replace.
B)
Timer wheels do not run.
B)
Tighten screws on timer.
C) Faulty timer motor.
C) Check and replace.
D) Faulty micros on timer or wrongly
connected.
D) Verify connections and/or change.
8)
Ice cubes are too large.
A)
Cycle thermostat adjusted too high.
A)
Adjust thermostat.
9)
Ice cubes are not completely
finished.
A)
Cycle thermostat adjusted too low.
A)
Adjust thermostat.
B)
Low refrigerant charge.
B)
Add refrigerant until there is frost
formation 5 cm from the compressor at
the end of the cycle.
10) Ice cubes are empty, rough
edges and very white.
A)
Insufficient
water in water pan;
unprimed pump.
A)
Eliminate water leak.
B)
Obstructed spray nozzles.
B)
Clean nozzles.
C) The curtain strips does not fully close
and lose water.
C) Adjust the curtain strips or clean the
axle (it may has calcareous impurities
that avoid a smooth turn of the strips).
11) Machine
doesn’t stop even when
bin is full.
A)
Faulty bin thermostat or wrongly
adjusted.
A)
Adjust and/or replace.
12) Ice cubes melt in bin.
A)
Obstruction in drains (inside the
machine or in premises).
A)
Unblock.
