viking ice machine by marvel with drain valve

viking ice machine by marvel with drain valve
LED flashing red light status: (viewable through the front grille on the main control board)
No light on - operations are normal
'
Light on for 10 seconds at the start of the clean cycle
Light flashes 2 times every 5 seconds - bin sensor out of range
Light flashes 3 times every 5 seconds - evaporator sensor out of range
Light
flashes -4~.
times . every - 5 seconds
sensors out of range
.
~ - both bin
....•. and evaporator
-
-----~.~
Thermistor resistance vs. temperature
Temperature
-18
-15
-10
-5
(C),
Temperature
o
5
10
15
20
25
5
14
23
32
41
50
59
68
77
60
140
o
(F)
chart
Resistance (KOHMS)
13.020
11.350
8.918
6.700
5.630
(Acceptable
4.520
3.652
2.970
2.430
2.000
tolerance
is +1- 4% of value)
.5904
Quick suggestions on what to look for: (*For more detailed diagnostic help please see the service manual)
1. Is the machine making too much ice? Check the bin thermistor resistance values and compare to chart.
2. Is the machine not running at all? Check the bin and evaporator thermistor resistance values and compare to chart. Either thermistor if open, shorted, or outside of a
parameter range will shut down all loads to the machine. For the bin thermistor tbat range is 25 -140 F. and for the evaporator thermistor 0 -140 F.
3. Is the machine making a thick slab ofice but not going into harvest mode? Check the evaporator thermistor resistance values and compare to chart. Be sure the
thermistor is tight to the bracket on the underside of the evaporator and that the bracket welds are not cracked or broken.
4. Is the machine making thin slabs of ice? Check that the drain valve is seating properly. A "leak by" condition will cause water to drain from the reservoir during the
production cycle. With water escaping the reservoir the circulation pump will begin struggling to pick up water to pump over the plate usually making a distinct
gurgling sound as the impeller picks up air and water together. Water should not leave the reservoir until the beginning of the harvest cycle. *Do not confuse normal ice
water melt off from the bin with water escaping from the reservoir due to a leaking drain valve. Normal production cycle times for this machine is between 45 and 90
minutes. Cycle times considerably less resulting in thin slabs and a noisy circularion pump is typically due to a leaking drain valve.
5. Is the machine stacking slabs on the cutter grid? Check to see if the machine is in~talled with a Marvel drain pump. If it is the drain pump may be at fault causing
minor power interruptions
thus never allowing the machine to go into a harvest cycle. This would prevent the cutter grid from being activated and the slabs would stack.
6. Is the machine running water over the plate but is not cooling? If the compressor is not running check that the machine is not set in the clean position. Check the
wiring to the ON 1OFFI CLEAN switch to determine if they have been reversed. Compare to the diagram on the fan shroud behind the grille.
7. Is the machine running, getting cold, bringing water into the reservoir but water i~ notflowing over the plate? Check the circulation pump 3 proug plug is fully seated
into the electrical receptacle located in tbe I'ear ":l!.!h------------ ~
,~
----- -~~-.- - .-_.
----
The setpoints~
Service tips:
Stop ice: 35.0 deg. F +1- 2 deg. F
Start ice: 43.0 deg. F +1- 2 deg. F
Harvest: 11.0 deg. F +1- 2 deg. F
Production: 45.0 deg. F +1- 2 deg. F
Setpoint vs Temperarure
and voltage (120VAC): +1- 3 deg. F
,or
•
Refrigeration Temperature -Pressure Chart for R-134A
F.
-12
-8
-4
2
PSI
1.1
2.8
4.5
6.5
7.5
F.
36
38
40
42
44
PSI
31.3
33.2
35.1
37
39.1
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
8.5
9.6
10.8
12
13.1
14.4
15.7
17
18.4
19.9
21.4
22.9
24.5
26.1
27.8
29.5
46
48
50
52
56
60
64
68
72
76
80
84
88
92
96
100
41.1
43.3
45.5
47.7
52.3
57.5
62.7
68.3
74.2
80.3.
86.8
93.6
100.7
108.2
116.1
124.3
o
I. The cutter grid is only powered up (12 VAC) at the start oftbe harvest
cycle and remains powered for only 35 minutes.
2. When changing a drain valve be sure to remove any foreign matter
putty found in the reservoir to prevent the new drain valve from
failing due to tbese items.
3. If a drain pump is being used, be sure the vent line is properly attached
up the back panel and is not restricted.
4. This machine is not recommended to be used with an RO water
system.
5. Any interruption of power to tbe machine greater than 25
milliseconds will cause the control to recycle to the start of a new
production cycle and lock out tbe compressor for up to 9 minutes.
Diagnosing by "dry cycling"
Dry cycling is an excellent way to diagnose tbis ice machine. Dry cycling can be achieved by turning tbe water supply off to
the machine or pulling the black drain plug from the underside of the reservoir. Without water flowtng over the plate tbere
is less heat being removed and the machine will reach its harvest set point usually within 5 minutes after tbe start of the
recirculating pump at the beginning of a _production cycle. This will cause the control to switch into harvest cycle. *See cycle
map on the opposite side of this sheet for sequencing and component on 1 off states for eacb cycle. Iftbe control does not cycle
into barvest check the evaporator plate for a full uniform frost pattern. Any void indicates a leak of refrigerant or sealed
problem. Check the evaporator plate temperature for 9 F. or lower. Check evaporator thermistor resistance value and
compare to chart. If harvest cycle initiates verify evaporator plate temperature
rises to 45 F. +1- 2 F. before cycling back into
a productiou cycle. Verify that the cutter grid wires begin to feel warm to the touch. Repeat observation. See a more complete
description of how to run this test on line at Service power. com.
*Tbe ice bin temperature in this machine is designed to be above freezing therefore it is absolutely normal for
the stored ice to be wet. This allows fresh ice to be made to achieve the highest quality taste and appearance.
*If the ice is not used or stirred on a regular basis it is absolutely normal for the ice to clump together or form
a hardened layer over top of the cubes. Using the scoop provide, this can be prevented by stirring the ice every
couple of days when the ice is not being consumed.
Need help?
Call Marvel Technical [email protected]
1-800-428-6644
Marvel product technical information available on line @ Servicepower.com
410500] I REV. A
Service Data Sheet
•
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