Service Manual

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e) FM and LLV Diagnosis: If FM or LLV does not energize, check for 115VAC at CB
K1#3 (BK) to neutral (W). If 115VAC is not present, replace CB. If 115VAC is present:
For FM, check capacitor, motor winding, and blade for binding.
For LLV, check coil voltage and continuity.
f) Refrigerant Pressures and TXV Diagnosis: If evaporator is still not cooling, check
refrigerant pressures. See "VIII.A. Specication and Performance Data."
Next, check TXV for proper operation. Remove TXV bulb and hold it in your hand,
refrigerant low-side pressure should rise, place TXV bulb in ice water, refrigerant
low-side pressure should drop. A 10 to 15 pound pressure swing between warm and
cold conditions indicate a good TXV. If a 10 to 15 pound swing is not present, replace
TXV.
g) Freeze Termination Diagnosis: After 5 min. in freeze, disconnect CB K5 FS
connector. 15 sec. later appliance should switch out of the freeze cycle (15 second
delay after FS opens before terminating the freeze cycle). If appliance remains in
freeze longer than 15 sec. after FS removed, replace CB. If appliance switches with
FS removed but would previously not switch out of freeze with FS connected (long
freeze - 3 beep alarm), see "II.E. Float Switch Check and Cleaning."
Note: Normal freeze cycle will last 20 to 40 min. depending on model and conditions.
Cycle times and pressures should follow performance data provided in this
manual. See "VIII.A. Specication and Performance Data."
h) Short Freeze Cycle Diagnosis: Conrm water tank lls and overows during ll and
harvest cycles. If not, check water supply lters, shut-off valve, WV screen. Ifwater
tank empties before 5 min. timer terminates and freeze cycle is short, check that CV
is not leaking by (water owing down the potable drain). If CV is leaking by, remove
and clean CV, replace rubber seat and spring if necessary. If water tank is full, see
"II.E. Float Switch Check and Cleaning." for erratic FS.
7) Pump-Out Cycle – LEDs 1, 3, and 2 are on (10/20 second pump-out). Timing of the
rst pump-out is determined by S4 dip switch 5. See the table below.
Control Board Settings
S4 Dip Switch Setting
Pump-Out
Frequency
1st Pump-Out
No. 5
OFF Every 10 cycles After 11th freeze cycle
ON Every cycle After 2nd freeze cycle
Comp continues, HGV energizes. If S4dip switch 3 & 4 are set to 3 off and 4 on,
LED 4 turns on and WV and X11 relay energize, energizing X10relay. NOTICE!S4dip
switch 3 & 4 must not be set to 3 off and 4 on. Otherwise, PM will rotate in freeze
cycle direction instead of pump-out direction. FM and LLVde-energize. PM stops
for 2 sec., then reverses for 10/20 sec. depending on pump-out timer (S4dip switch 3
& 4) setting. When the pump-out timer terminates, pump-out is complete. The pump-
out frequency control (S4 dip switch 5) is factory set, and generally no adjustment is
required. However, the pump-out frequency control can be set to have a pump-out occur
every 10 cycles or every cycle. For details, see "III.C.4. Pump-Out Frequency Control
(S4 dip switch 5)."