Service Manual

SiUS041638E Trial Operation
Trial Operation and Field Settings 106
3. Trial Operation
Outline 1. Measure the supply voltage and make sure that it is within the specified range.
2. In cooling operation, select the lowest programmable temperature;
in heating operation, select the highest programmable temperature.
3. Carry out the trial operation following the instructions in the operation manual to ensure that all
functions and parts, such as the movement of the flaps, are working properly.

To protect the air conditioner, restart operation is disabled for 3 minutes after the system has
been turned off.
4. After trial operation is complete, set the temperature to a normal level (78°F to 82°F (26°C to
28°C) in cooling operation, 68°F to 75°F (20°C to 24°C) in heating operation).
Procedure When operating the air conditioner in cooling operation in winter, or heating operation in summer,
set it to the trial operation mode using the following method.
With remote controller
(1) Press On/Off button to turn on the system.
(2) Press the center of Temp button and Mode button at the same time.
(3) Select “
T
” (trial operation) with Temp  or Temp  button.
(4) Press Mode button to start the trial operation.
(5) Press Mode button and select operation mode.
(6) Trial operation will stop automatically after about 30 minutes.
To stop trial operation, press On/Off button.
Test Items
(2) (4) (5)
(1) (6)
(2) (3)
(3)
(R24542)
Test items Symptom
Indoor and outdoor units are installed securely. Fall, vibration, noise
No refrigerant gas leaks. Incomplete cooling/heating function
Refrigerant gas and liquid pipes and indoor drain hose extension
are thermally insulated.
Water leakage
Draining line is properly installed. Water leakage
System is properly grounded. Electrical leakage
Only specified wires are used for all wiring, and all wires are
connected correctly.
No operation or burn damage
Indoor or outdoor unit’s air inlet or air outlet are unobstructed. Incomplete cooling/heating function
Stop valves are opened. Incomplete cooling/heating function
Indoor unit properly receives remote controller commands. No operation
Remote controller jumper setting is correct for the type of unit
(heat pump or cooling only).
Remote controller malfunctioning