Troubleshooting - Hiyasu AQUH/C 24 Serie Manuel D'utilisateur

TROUBLESHOOTING

Instructions relating to heating are applicable only to " HEAT & COOL MODEL" (Reverse Cycle).
In the event of a malfunction (burning smell, etc.), immediately stop operation, turn off the electrical breaker, and consult
authorized service personnel.
Merely turning off the unit 's power switch will not completely disconnect the unit from the power source.
Always be sure to turn off the electrical breaker to ensure that power is completely off.
Before requesting service, perform the following checks:
Symptom
NORMAL Doesn 't operate immedi-
FUNCTION ately:
Noise is heard:
Mist or steam are
emitted:
The operation is stopped:
Water is produced from
the outdoor unit:
Doesn 't operate at all:
CHECK ONCE
MORE
Poor Cooling (or Heating)
performance:
If the problem persists after performing these checks, or if you notice burning smells, stop operation immediately, turn off the electrical
breaker, and consult with authorized service personnel.
WARNING!
Problem
If the unit is stopped and then immediately started again, the com-
pressor will not operate for about 3 minutes, in order to prevent
fuse blowouts.
Whenever the electrical breaker is turned off then on again, the
protection circuit will operate for about 3 minutes, preventing unit
operation during that period.
During operation and immediately after stopping the unit, the
sound of water flowing in the unit's piping may be heard.
Also, noise may be particularly noticeable for about 2 to 3 minutes
after starting operation (sound of coolant flowing).
During Heating operation, a sizzling sound may be heard occa-
sionally. This sound is produced by the Automatic Defrosting op-
eration.
During Heating operation, the outdoor unit 's fan may stop, and
steam may be seen rising from the unit. This is due to the Auto-
matic Defrosting operation.
During Heating operation, if the water temperature rises above
the thermostat setting, the outdoor unit will stop.
If you wish to warm the water further, set the thermostat to a
higher setting.
During Heating operation, the unit will temporarily stop opera-
tion (between 2 and 16 minutes) as the Automatic Defrosting mode
operates. During the Automatic Defrosting operation,
be shown on the remote controller display.
During Heating operation, water may be produced from the out-
door unit due to the Automatic Defrosting operation.
Has there been a power failure?
Has a fuse blown out, or a circuit breaker been tripped?
Is the timer operating?
Did you adjust the water temperature settings correctly?
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