Panasonic S-36PU1E5 Technical Data & Service Manual page 365

3 Problem
The intake temperature (ambient temperature) of the indoor unit is
around the
3-6
above 36°C.
heat
exchanger
3-7 The filter of the indoor unit is clogged.
3-8 The fan of the indoor unit is broken or the fan motor is faulty.
4 Blockage
Is the outdoor unit's electronic control valve operating correctly?
in the
4-1 (Check for debris clogging the electronic control valve, a problem
refrigerant
with the electronical coil and/or the control PC board.)
circuit
The indoor unit's expansion valve is operating correctly.
4-2 (check for debris clogging the valve, a problem with the electronical
coil and/or the control PC board)
If an alarm is occurred with the high pressure below 3.80 MPa,
with the pressure measured as displayed by the manifold gauge,
4-3
check the check valve in the compressor discharge line.
Are these checking finished without fail?
The electronic control valve is faulty.
4-4 In systems where the solenoid valve kits and the ice thermal
storage tank are connected, check these solenoid valves.
5
5-1 Error occurs when the system is operating in cooling mode.
Overcharging
5-2 Error occurs when the system is operating in heating mode.
An alarm is occurred with the high pressure at 3.80 MPa, with the
pressure measured either as displayed by the monitoring software
or with a manifold gauge, at which time the temperature of liquid in
5-3
the outdoor unit's heat exchanger is detected to be at the
temperature of the outside air.
An alarm is occurred with the high pressure at 3.80 MPa, with the
pressure measured either as displayed by the monitoring software
5-4
or with a manifold gauge, at which time the temperature of liquid in
the indoor heat exchanger is detected to be at room temperature
(intake temperature).
The system may be overcharged. Check how much refrigerant was added during installation.
When a system is inspected for airtightness, it is seldom that enough nitrogen has been
5-5
expelled, so some remains in the circuit.
In this case, it is necessary to collect the refrigerant and then recharge the system.
5-45
Prevent air short
Yes
circuit
No 3-7
Yes Clean the filter
No 3-8
Replace the indoor
Yes
fan (motor)
No 4-1
Yes 4-3
Repair the electronic
No control valve of the
outdoor unit
Yes 4-3
Repair the expansion
No valve of the indoor
unit
Yes 4-4
Replace the check
valve in the
No
compressor
discharge line
Replace the
electronic control
Yes
valve and/or
solenoid valve.
No 5-1
Yes 5-3
No 5-2
Yes 5-4
No 5-5
Yes 5-5
Contact the service
No
representative
Yes 5-5
Contact the service
No
representative
5