Hoshizaki HUR40A(-D) - Manual (Page 44)

44
Problem Possible Cause Remedy
[9] Defrost cycle
lasts too long.
a) Defrost Thermistor 1. Defective. 1. Replace.
b) Control Board 1. Defective. 1. Replace.
c) Defrost 1. Not enough defrosts
occurring per day.
Operation in humid
conditions.
1. Factory default is once every
6 hours. If coil is frosting too
much, can shorten defrost
interval.
d) Defrost Heater 1. Defective. 1. Replace heaters.
e) Safety Defrost
Thermostat
1. Defective, turning off
heaters prematurely,
or fused open.
1. Replace safety defrost
thermostat.
[10]Condensate
water overflow.
a) Cabinet Contents 1. Loading of large
volumes of warm,
moist, uncovered
product.
1. Cover product with plastic
wrap.
b) Location of Unit 1. Unit located near high
humidity source such
as fryer, steamer, etc.
1. Relocate.
c) Seals 1. Poor sealing around
evaporator, door
gaskets.
1. Adjust or replace.
d) Environment 1. Extreme environment
and door-opening
conditions.
1. Adjust conditions.
[11] Abnormal Noise a) Fasteners 1. Loose fasteners allow
vibration of part.
1. Tighten fasteners.
b) Compressor 1. Problem with mount. 1. Properly mount compressor.
Replace any missing
grommets.
2. Floodback to
compressor.
2. Check for signs of floodback
to compressor. Evacuate and
recharge if necessary.
3. Defective. 3. Replace.
c) Fan 1. Fan blade loose. 1. Adjust and tighten.
2. Defective motor. 2. Replace.
d) Relay 1. Chattering. 1. Replace.