Hoshizaki Modular Cubelet Serenity Series Service Manual page 19

10) Refill Cycle – "GM", "COMP", and "WTRIN" LEDs are on.
LFS opens. WV energizes and FT starts. GM, CCR, EH, PDS, MC, Comp, and FMR
continue. LFS closes. Nothing occurs at this time. Reservoir continues to fill until UFS
closes. When UFS closes, WV de-energizes, 90-sec. FT terminates, and 30-sec. FZT
starts. If UFS remains open longer than 90-sec. after LFS opens, FT exceeded and
CB sounds a 1-beep alarm. WV remains energized until UFS closes. Alarm resets
automatically when UFS closes.
Diagnosis – Confirm that the water level has dropped and the UFS and LFS are open.
See "II.F.1. Float Switch Check." Check that "WTRIN" LED is on. If LFS is open and
"WTRIN" LED is off, replace CB. If "WTRIN" LED is on, check that the reservoir fills.
If not, check water supply line shut-off valve, water filters, and WV screen. If "WTRIN"
LED is on and WV is off, check CB K2 #8 (O) to a neutral (LBU) for 24VAC. If 24VAC is
not present, check CB K2 #9 (W/R) to a neutral (LBU) for 24VAC. If 24VAC is present
on CB K2 #9 (W/R) and not on CB K2 #8 (O), replace CB. If 24VAC is present on
CB K2 #8 (O), check continuity through WV solenoid. If open, replace WV. If WV is
energized and refill exceeds FT with no water in the reservoir, check for DV leaking. If
reservoir is full and overflowing check for open UFS. See "II.F. Float Switch Check and
Cleaning." If UFS is closed, check that WV de-energizes. If not, check CB K2 #8 (O)
to a neutral (LBU) for 24VAC. If 24VAC is present, replace CB. If WV de-energizes and
water continues to fill the reservoir, replace WV.
Note: Each time UFS closes, 30-min. freeze timer starts. The 30-min. freeze timer
resets when UFS closes again. If UFS does not close again within 30-min., CB
shuts down the unit and sounds a 5-beep alarm every 5 sec.
See "III.A.2 LED Lights and Audible Alarm Safeties."
FT: 90-Sec. Low Water Safety Timer – When LFS opens, 90-sec. low water safety
timer starts. If UFS does not close within 90 sec. after LFS opens (FT exceeded),
CB sounds a 1-beep alarm and a 90-sec. shutdown cycle starts.
See "III.A.2. LED Lights and Audible Alarm Safeties." PDS de-energizes. Refrigeration
circuit low-side pressure drops to 9 PSIG, opening CLPS. CLPS opens, de-energizing
MC, which de-energizes Comp and FMR. GM, CCR, and EH continue. 90-sec. purge
timer terminates. GM, EH, and CCR de-energize. WV and 1-beep alarm continue until
UFS closes.
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