Cabinet Cooling - Hoshizaki REFRIGERATED PREP TABLE WITH RAISED RAIL 73168 Service Manual

Problem
[3] Compressor will
not start or
stops operating.
(continued)

2. Cabinet Cooling

Problem
[1] Cabinet
temperature too
high.
Possible Cause
f) Voltage
g) High Pressure Switch
g) High Pressure Switch
(continued)
h) Thermistors (cabinet
and rail)
i) Compressor Overload
j) Compressor
k) Control Board
Possible Cause
a) Warm Food
b) Doors/Drawers
c) Outside Heat Source
d) Air Flow
e) Cabinet Thermistor
f) Setpoint and/or
Temperature
Correction Factor
1. Too low.
2. Too high.
1. Restricted air flow to
condenser.
2. Condenser air filter
and/or condenser
clogged.
3. Bad contacts.
4. Condenser fan motor.
5. Refrigerant line or
component plugged or
restricted.
6. Refrigerant overcharge. 6. Recover, evacuate, and
7. Non-condensibles in
system.
1. Defective.
1. Defective. (open
contacts)
1. Open windings.
2. Locked rotor.
1. In alarm or defective.
1. Warm food recently
placed in cabinet area.
1. Left open, opened too
often.
2. Not sealing, opened
frequently, or open for
long intervals.
1. Too close to unit.
1. Blockage inside
cabinet.
1. Defective.
1. Incorrect.
34
Remedy
1. Call electrician.
2. Call electrician.
1. Move unit or increase
ventilation.
2. Clean.
3. Check continuity and
replace.
4. See [2] a) and b).
5. Recover, remove
restriction, replace drier,
evacuate, and recharge.
recharge.
7. Recover, replace drier,
evacuate, and recharge.
1. See "II.E. Thermistor
Check."
1. Replace.
1. Check for continuity and
replace.
2. Replace.
1. See "III.A. Alarm Signals"
or replace
Remedy
1. Pre-cool food or allow time
for unit to return to setpoint
temperature.
1. Close.
2. Check for sealing, check for
door open at time of warm
cabinet temperature.
1. Separate unit from heat
source.
1. Remove blockage by
removing or redistributing
food product.
1. See "II.E. Thermistor
Check."
1. Correct setting(s).
See "II.D.4.c) Temperature
Setpoint" or
"II.D.4.f) Temperature
Correction Factor" for
defaults.