Hoshizaki AMERICA 73183 - Manual (Page 21)

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(2) 8-min. EvapFM delay timer terminates: 5 min. after Comp and ConFM
energize, confirm EvapFM energizes. If not, confirm doors are closed and DS
engaged. Next, check for 115VAC at CM F6 (BK) to neutral (W). If 115VAC is not
present, replace CM and DM with HS kit. If 115VAC is present, check for 115VAC
at DSR #4 (DBU) to neutral (W).
If 115VAC is not present, check for 115VAC at DSR #6 (BK) to neutral (W).
If 115VAC is present on DSR #6 (BK) to neutral (W) and not on DSR #4 (DBU) to
neutral (W), replace DSR. If 115VAC is present on DSR #4 (DBU) to neutral (W)
and EvapFM is not energized, check EvapFM blades for binding and EvapFM
continuity.
(3) 13-min. temperature display delay timer terminates: 5 min. after EvapFM
energizes, "dEF" is replaced by cabinet temperature on display. If not, replace
CM and DM with HS kit.
2b) Manually Initiated Defrost-Termination: Has DTh warmed to 59°F (15°C)? If not
yet confirmed, confirm DTh status. See "II.D. Thermistor Check." If DTh is in proper
range, DH de-energizes and 3 delay timers start. If DTh has not warmed to 59°F
(15°C), check DT and DH continuity. Next, check DH amp draw.
(1) 3-min. Comp/ConFM and EvapFM delay timers terminate: 3 min. after DH
de-energizes, confirm Comp, ConFM, and EvapFM energize. If Comp and
ConFM do not energize, confirm cabinet temperature is warm enough for Comp
and ConFM operation.
Comp and ConFM: Check for 115VAC at CM C1 (R) to neutral (W). If 115VAC
is not present, check CTh status. See "II.D.Thermistor Check." If CTh ohm
reading is in proper range, replace CM and DM with HS kit. If 115VAC is present,
check for 115VAC at CR #4 (BK) to neutral (W) and CR #1 (R) to neutral (W).
If 115VAC is present at CR #4 (BK) to neutral (W) but not at CR #1 (R) to neutral
(W), replace CR. If 115VAC is present at CR #1 (R) and Comp or ConFM are not
energized, check Comp start components, Comp protector (internal on 1-section,
external on 2-section), and Comp motor winding continuity. If ConFM is not
energized, check ConFM fan blades for binding and motor winding continuity.
EvapFM: Confirm EvapFM energizes. If not, confirm doors are closed and DS
engaged. Next, check for 115VAC at CM F6 (BK) to neutral (W). If 115VAC is not
present, replace CM and DM with HS kit. If 115VAC is present, check for 115VAC
at DSR #4 (DBU) to neutral (W). If 115VAC is not present, check for 115VAC at
DSR #6 (BK) to neutral (W). If 115VAC is present on DSR #6 (BK) to neutral (W)
and not on DSR #4 (DBU) to neutral (W), replace DSR. If 115VAC is present
on DSR #4 (DBU) to neutral (W) and EvapFM is not energized, check EvapFM
blades for binding and EvapFM continuity.
(2) 13-min. temperature display delay timer terminates: 10 min. after Comp,
ConFM, and EvapFM energize, "dEF" is replaced by cabinet temperature on
display. If not, replace CM and DM with HS kit.
Legend: CM–control module; Comp–compressor; ConFM–condenser fan motor;
CR–compressor relay; CTh–cabinet thermistor; DH–defrost heater;
DM–display module; DrH–drain heater; DSR–door switch relay;
DT–defrost thermostat; DTh–defrost thermistor; EvapFM–evaporator fan motors;
HPS–high-pressure switch; MH–mullion heater; PH–perimeter heater;
TXV–thermostatic expansion valve