Hoshizaki 73183 Manual Do Utilizador

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7) 

Startup/Cool Down–EvapFM and MH energize. There is a slight delay, then Comp and 

ConFM energize and cabinet temperature or high-temperature alarm (Hi) appears on 
DM.

a) 

Startup Diagnosis: Check that EvapFM energize. If not, confirm that the door(s) are 

closed and DS contacts are closed. Check EvapFM blades for binding. Next, check for 
115VAC at DSR terminals 7 and 8. If 115VAC is not present, check DS continuity. If 
115VAC is present, check DSR coil continuity and contact continuity between terminals 
6 and 4. If coil or contacts are open, DSR is bad and must be replaced. If DSR is good, 
check EvapFM continuity.

 b) 

Cool Down Diagnosis: Confirm that Comp and ConFM energize and cabinet 

temperature appears on DM. If not, confirm 115VAC between CM L3 and CM N5. If 
115VAC is not present, confirm wiring connections are secure for both the power wire 
(CM L3) and the neutral wire (CM N5). If 115VAC is present and DM is off, check that 
the display cable between CM and DM is not disconnected; reconnect if loose. If DM is 
still off, CM or DM may be bad, so replace both. Next, check that Comp and ConFM are 
energized. If not, check for 115VAC between CM C1 and CM N5. If 115VAC is present 
between CM L3 and CM N5 (above) and not between CM C1 and CM N5, check CTh 
status. See "IV.C.Thermistor Check." If CTh ohm reading is in proper range, CM is
bad and must be replaced. If 115VAC is present between CM C1 and CM N5, check 
for 115VAC on CR coil (terminals 5 and 6). If 115VAC is not present between CR 5 
and CR 6, check continuity of HPS. If open, allow time for HPS to reset. If HPS does 
not reset, replace HPS and diagnose reason for HPS activation. See "IV.A.1.7)c) HPS
Activation." If 115VAC is present between CR 5 and CR 6, and Comp and ConFM are
not energized, check for 115VAC between CR terminal 4 and neutral and CR terminal 1 
and neutral. If 115VAC is present between CR terminal 4 and neutral and not CR 
terminal 1 and neutral, CR is defective and must be replaced. If CR is good and Comp 
or ConFM are not energized, check for 115VAC at Comp terminals, Comp overload 
(integrated with start relay), start components, and Comp and ConFM motor winding 
continuity.

  If Comp and ConFM are energized and the cabinet does not cool down, check for a 

restriction in the refrigeration circuit, correct TXV operation, and correct refrigerant 
charge.

c) 

HPS Activation: Confirm ConFM is energized and fan blade turns freely. Check that the 

condenser coil is not clogged or restricted. Check that there are no restrictions in the 
refrigeration circuit. 

  Confirm that unit location meets factory requirements: 

• This unit is not intended for outdoor use. Normal operating ambient temperature should

be within 45°F to 100°F (7°C to 38°C). 

• The unit should not be located next to ovens, grills, or other high heat producing

equipment.

• The unit should not be located in a corrosive environment.
• The unit should be a minimum of 4" (11 cm) from side walls.
• A minimum of 10" (25 cm) overhead clearance should be provided for proper ventilation.