Hoshizaki REFRIGERATED PREP TABLE WITH RAISED RAIL 73168 Service Manual page 35

Problem
[1] Cabinet
temperature too
high. (continued)
[2] Cabinet temperature
too low.
Possible Cause
g) Defrost
h) Air Filter or Condenser 1. Clogged, dirty.
i) Cabinet Fan Motor
j) Cabinet Liquid Line
Valve
k) Service Valve(s)
l) Refrigerant
m) Expansion Valve
n) Compressor
o) Control Board
a) Setpoint and/or
Temperature
Correction Factor
b) Frozen Food
c) Cabinet Thermistor
d) Cabinet Liquid Line
Valve
e) Compressor Relay
f) Control Board
1. Defrost time
insufficient to remove
frost. Operation in
humid conditions.
2. Incomplete defrost.
1. Defective.
1. Does not open.
1. Partially or completely
closed.
1. Leak.
1. Operating erratically.
1. Defective.
1. Defective.
1. Incorrect.
1. Frozen food recently
placed in refrigerator.
1. Defective.
1. Does not close.
1. Defective; contacts
welded.
1. In alarm or defective.
35
Remedy
1. See "4. Cabinet Defrost."
2. See "4. Cabinet Defrost."
1. Clean.
1. Check and replace.
1. Check and replace.
1. Confirm service valve is
open.
1. Recover, repair leak,
replace drier, evacuate, and
recharge.
1. Check and replace.
1. See "1.[3] Compressor will
not start or stops operating."
1. Replace.
1. Correct setting(s).
See "II.D.4.c) Temperature
Setpoint" or
"II.D.4.f) Temperature
Correction Factor" for
defaults.
1. Allow time for unit to return
to setpoint temperature.
1. Check and replace.
1. Check and replace.
1. Replace.
1. See "III.A Alarm Signals" or
replace.