Howe Rapid Freeze, Руководство по обслуживанию

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14 TroubleShooting Chart
44
PROBLEM PROBABLE CAUSE REMEDY
VAC).
control module, voltage
reading should be 24
VAC. If 24 VAC is not
present, control
transformer may be
defective, check &
replace.
Control switch(es) open. Check
voltage between terminals # 1
& 3,
Check switches and ice
level control for proper
operation. Close switches,
or replace if defective.
a) Switch(es) open,
voltage should be 0 VAC
b) Switches closed,
voltage should be 24 V AC
Check voltage between 2
& 6 If
24 VAC present, output is
defective, replace module.
Drive motor contactor is
not energized. Solenoid
valve is energized.
Control module output is
defective, or contactor coil
burnt, or open wire in circuit.
0 VAC present, module
output (#6) is OK; check
wiring or contactor coil
Remove wires from 7 & 8,
set meter to ohms, and
check for continuity
between terminals 7 & 8, (
(while module is
energized, all switches in
the on (
closed)
position.)
Contacts open, output
defective, replace module.
Solenoid valve not
energized. Drive motor
contactor is energized.
Control module isolated contacts
will not close (provided all
switches are closed), or power is
not brought to line
A
from line
2
,
or solenoid coil defective.
Contacts closed, Module
output OK,
Check line "A" jumper or
CR
3
contacts. (see wiring
diagram) Check wiring
or solenoid coil.
Drive motor always stays
on.
Power is maintained to input # 3.
on-off switch(es) and or ice level
control (is) are not shutting off.
Check on-off switch(es)
and ice level control for
proper operation,
replace if defective.