Hoshizaki REFRIGERATED PREP TABLE WITH RAISED RAIL 73168 - Manual (Page 33)

33
Problem Possible Cause Remedy
[1] The unit will not
start.
a) Power Supply 1. Unplugged, off,
blown fuse, or tripped
or defective circuit
breaker.
1. Turn on, replace, or check
and reset. Call electrician if
breaker trips repeatedly.
2. Loose connection. 2. Tighten.
3. Not within
specifications.
3. Refer to nameplate and
correct.
b) Cord and Plug 1. Defective. 1. Replace.
c) Control Switch 1. "OFF" position. 1. Move to "ON" position.
2. Bad contacts. 2. Check for continuity and
replace.
d) Transformer 1. Open coil winding. 1. Check continuity and
replace.
e) Wiring to Control Board 1. Loose connections or
open.
1. Check for continuity and
replace.
f) Control Board 1. In alarm. 1. See "III.A. Alarm Signals."
2. Defective. 2. Replace.
[2] Cabinet, rail, or
condenser fan will
not start.
a) Fan Motor 1. Motor winding open. 1. Replace.
2. Bearing worn out. 2 Replace.
3. Wiring to fan motor. 3. Check for loose or open
connection, and replace.
4. Fan blade bound. 4. Check and replace.
b) Evaporator Fan, Rail
Fan, or Compressor
Relay
1. Bad contacts. 1. Check for continuity and
replace.
2. Coil winding open. 2. Replace.
c) Control Board 1. Defective. 1. Replace.
[3] Compressor will
not start or stops
operating.
a) Compressor Relay 1. Bad contacts. 1. Check for continuity and
replace.
b) Compressor Control
Relay
1. Bad contacts. 1. Check for continuity and
replace.
2. Open winding. 2. Replace.
c) Start Relay 1. Bad contacts. 1. Replace.
2. Coil winding open. 2. Replace.
d) Start Capacitor 1. Defective. 1. Check and replace.
e) Wiring to Compressor 1. Loose connection(s). 1. Tighten.
2. Faulty. 2. Check continuity and
replace.
7. Control Board Alarms (EA and ED)
"EA" is displayed when an EEPROM write error is detected. "ED" is displayed when an
EEPROM verification or read error is detected.
Reset Options
Replacing the control board with a functioning control board will eliminate this alarm
condition.
B. Service Chart
1. No Operation