Service manual
Table Of Contents
- Cover
- Table of Contents
- Packaged Air Conditioners Duct Connection Type (High static Pressure Application) FD-K Series — Cooling Only —
- Part 1 Model Name and Power Supply
- Part 2 Functions
- Part 3 Specifications
- Part 4 Remote Controller (Optional Accessories)
- Part 5 Field Piping and Wiring
- Part 6 Function and Operation
- Part 7 Troubleshooting
- 1. Maintenance Inspections
- 2. How to Handle Request for Maintenance
- 3. Troubleshooting Based on Equipment Condition
- 3.1 Troubleshooting Based on Equipment Condition
- 3.2 Equipment does not Operate
- 3.3 Fan Operates, but Compressor does not.
- 3.4 Cooling Operation Starts but Stops Immediately.
- 3.5 After Equipment Shuts Down, It cannot be Restarted for a While.
- 3.6 Equipment Operates but does not Provide Cooling.
- 3.7 Equipment Discharges White Mist
- 3.8 Equipment Produces Loud Noise or Shakes
- 3.9 Equipment Discharges Dust.
- Part 8 Removal Procedure
- Part 9 Appendix
- Packaged Air Conditioners Duct Connection Type (High static Pressure Application) FDY-K(A) Series — Heat Pump —
- Part 1 Model Name and Power Supply
- Part 2 Functions
- Part 3 Specifications
- Part 4 Remote Controller
- Part 5 Field Piping and Wiring
- Part 6 Field Setting
- Part 7 Function and Operation
- Part 8 Troubleshooting
- 1. Maintenance Inspections
- 2. How to Handle Request for Maintenance
- 3. Troubleshooting Based on Equipment Condition
- 3.1 Troubleshooting Based on Equipment Condition
- 3.2 Equipment does not Operate
- 3.3 Fan Operates, but Compressor does not.
- 3.4 Cooling/Heating Operation Starts but Stops Immediately.
- 3.5 After Equipment Shuts Down, It cannot be Restarted for a While.
- 3.6 Equipment Operates but does not Provide Cooling.
- 3.7 Equipment Operates but does not Provide Heating.
- 3.8 Equipment Discharges White Mist
- 3.9 Equipment Produces Loud Noise or Shakes
- 3.10 Equipment Discharges Dust.
- 3.11 Remote Controller LCD Displays "88".
- 4. Procedure of Self-Diagnosis by Remote Controller
- 5. Procedure of Self-Diagnosis by LED
- 6. Troubleshooting by Remote Controller Display / LED Display
- 6.1 Explanation for Symbols
- 6.2 Malfunction Code and LED Display Table
- 6.3 Failure of Indoor Unit PC Board
- 6.4 Malfunction of Heat Exchange Temperature Sensor System
- 6.5 Malfunction of Suction Air Temperature Sensor System
- 6.6 Malfunction of Remote Controller Air Thermistor
- 6.7 Actuation of Safety Device
- 6.8 Actuation of Safety Device
- 6.9 Failure of Outdoor Unit PC Board
- 6.10 High Pressure System (HPS) Malfunction
- 6.11 Low Pressure System (LPS) Malfunction
- 6.12 Malfunction of Electronic Expansion Valve
- 6.13 Discharge Pipe Temperature Malfunction
- 6.14 Malfunction of High Pressure Switch
- 6.15 Malfunction of Low Pressure Switch
- 6.16 Malfunction of Outdoor Temperature Sensor System
- 6.17 Malfunction of Discharge Pipe Temperature Sensor System
- 6.18 Malfunction of Heat Exchanger Temperature Sensor System
- 6.19 Short of Gas Malfunction
- 6.20 Reverse Phase
- 6.21 Malfunction of Transmission (Between Indoor and Outdoor Unit)
- 6.22 Malfunction of Transmission (Between Indoor Unit and Remote Controller)
- 6.23 Transmission Error Between Main Remote Controller and Sub Remote Controller
- 6.24 Failure of Field Setting Switch
- Part 9 Appendix
- Index
- Drawings & Flow Charts
How to Handle Request for Maintenance Si42-107
70 Troubleshooting
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(6(
YES
NO NO
Cooling
NO
NO
YES
Runs
Runs
Nomal
Nomal
Doesn't run
YES
YES
(Maintenance required)
OK.We'll be right over.
(P1268)
Turn the power supply
switch ON or replace
the fuse.
Wait until
power failure
is over.
Is there a
power
failure?
Doesn't run at all
The power supply switch is
OFF or the switch's fuse is
burnt.
Set the remote
controller's temperature
setting to:
(1)When
cooling:Minimum
(2)When
heating:Maximum
The fan comes on
but the
compressor
doesn't run.
Cooling starts but
stops right away.
Try turning the
Operation switch OFF
and On.
The unit won't run
again for a while
after stopping.
The unit runs but
doesn't cool the
room.
Measure the suction
/disharge temperature.
Did you allow 3 minutes to
elapse after turning ON?
Is there something causing the
indoor load to be large, such as
an open window or door?
(Temperature differential
=suction temperature - discharge temperature)
Operation is
normal.
Temperature
differential is 8~18˚C
(1) The operation circuit fuse is
disconnected or is making poor contact.
(2) The operation swich is broken or its
contact is defective.
(3) The high pressure switch is broken.
(4) The fan motor's magnetic switch is
broken.
(5) The fan motor's protection thermostat is
being actuated or is broken.
(6) The compressor's overcurrent relay is
broken.
(7) The compressor's protective thermostat
is broken.
(8) The electrical system insulation is
defective.
(9) The compressor's magnetic switch's
contact is defective.
(10) The compressor is broken.
(11)
Thermostat is broken.
(12) The cool/heat selector is broken.
(13) The operation switch is broken.
(14) The compressor's magnetic swich is
broken.
(15)
Over-charged with refrigerant.
(16)
Air is mixed inside the refrigerant
circuit.
(17)
The pressure switch is broken.
(18)
The outdoor unit fan motor's magnetic
switch is broken.
(19)
The outdoor unit fan motor's auxiliary
relay is broken.
(20) The outdoor unit's heat exchanger is
dirty.
(21) There is something blocking the
outdoor unit's air flow.
(22) Malfunction of the outdoor unit's fan.
(23) Overcurrent relay (for compressor)
(24) Compressor's protective themostat
(25) The causes for the overcurrent relay
(for compressor) being actuated are:
(26)-1 Power supply voltage is lower than
prescribed.
(26)-2 High pressure is too high.
(26)-3 The power supply cord is too small.
(26)-4 The compressor is broken.
(27) The causes for the compressor's
protective thermostat
(27)-(1) Unsatisfactory compression from
the compressor
(27)-(2) Defective refrigerant
(27)-(3)
Unsatisfactory refrigerant circulation