Download Technical Manual for Servicing

Post-installation inspections (checklist)
Checkpoint
Yes/No
Have the installation restrictions on the heat pump unit been met?
(See pages 5 and 6)
Installation work
Has enough space been provided for maintenance around the heat
pump unit?
Is the outside of the heat pump unit marked, scratched or deformed?
Have copper pipes been used for the heat pump pipes?
Is the pipe length within 15 meters with no more than 6 bends?
Is the vertical interval of the pipe within 3 meters? Is the tube-shaped
pipe length within 3 meters?
Piping work
Have the pipes and joints been insulated properly, and has the proper
additional heat insulation been provided?
Has the work to protect the equipment from freezing been done
properly?
Is any water leaking from the pipe?
Does the power cable have the correct thickness?
Electrical wiring
work
Are the circuit breakers adequate?
Has the equipment been grounded properly?
Are any of the wires loose and unsecured?
Periodic inspections (The customer is charged for this service.)
Periodic inspection once every 3 or 4 years recommended
• This unit’s constituent parts will deteriorate over the course of time. Depending on the operating
environment and operating conditions, the unit’s performance may be adversely affected, making it
impossible for it to function to the best of its ability. A periodic inspection once every 3 or 4 years is
therefore recommended. (For details on the charges for this inspection, consult the vendor of the unit.)
Troubleshooting
Before requesting repairs
The symptoms listed in the table below are not indications that something is wrong with
the unit.
Symptom
Cause
During operation, the heat pump unit’s
heat exchanger turns white.
Frost may form on the heat exchanger during operation in the
winter months. When the layer of frost reaches a certain
thickness, the unit will perform the defrosting operation
automatically.
The heat pump unit’s fan repeatedly
starts up and shuts down.
This happens because the unit is automatically performing a
defrosting operation in order to remove the layer of frost that has
built up on the heat exchanger.
Water runs out from the bottom of the
heat pump unit during operation.
What happens is that the moisture in the air condenses on the
heat exchanger during operation, and this runs out as water.
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