Honeywell HWAC-1217S User manual

Professional Installation Required!
Please read and retain these troubleshooting instructions.

2
ErrorName
Reference
Code Page
Internal Temperature Sensor Error
E1
External Coil Sensor Error
E2
Internal Coil Sensor Error
E3
Internal Fan Error Of Indoor Unit
E4
Indoor Unit And Outdoor Unit Communication Error
E5
External DC Fan Error
F0
Module Protection Error
F1
PFC Protection Error
F2
Compressor Out-of-Step Error
F3
Exhaust Sensor Error
F4
CompressorTop Head Sensor Error
F5
External Temperature Sensor Error
F6
OVP Or UVP Error
F7
Outdoor Unit Control Panel And ModulePanel
Communication Error
F8
Outdoor Unit EE Error
F9
Recirculated Valve Switch Error
FA
Protectionof Frequency Conversion
FB
ERROR CODES –TABLE OF CONTENTS

3
Causeof Error Cause: Explains the most common error cause.
Inspection path: The order of troubleshooting.
Tools Required Tools that shouldbe utilized to fix/maintenance the error.
Possible Broken Part Any possibly broken part related to the error that may need to
be replaced.
Troubleshooting
Procedures
All the troubleshooting procedures are prepared from simple
to complex, from surface to internal, and from test to
replacement. These procedures cover the most common
causes for an error code to occur.
Key Details Often overlooked key details for licensed professional to
consider.
TERMS GUIDE/TABLE OUTLINE

4
Causeof Error
Cause: The unit detects a short circuit or open circuit of the
indoor temperature sensor during the inspection of main
control panel in the indoor unit, indicated by “internal
temperature sensor error”.
Inspection path: Sensor →Sensor wire →Connectors →
Main indoor unit control panel
Tools Required Multimeter, 15KΩstandard sensor (25℃)
Possible Broken Part Internal temperature sensor, main internal control panel
Troubleshooting
Procedures
1. Check if there’s resistance problem, short circuit or open
circuit in the sensor; the resistance value should be
within a reasonable range (15KΩ under the temperature
of 25℃)
2. Check if the sensor wire is broken.
3. Check if the terminal connectors are well fixed; check if
the weld between the terminal and the main control
panel is loose and pull the terminal slightly for
inspection if necessary.
4. Check if the sensor is damp/wet.
5. If no standard sensor is available, replace the internal
temperature sensor, and then check if the error persists;
if yes, check the main internal control panel and replace it.
Key Details
You can switch the unit to “Fan” mode and judge the accuracy
of the sensor though the temperature displayed on the screen.
DO NOT USE A SENSOR WITH A VALUE LOWER OR HIGHER
THAN 15KΩ
E1 –INTERNAL TEMPERATURE SENSOR ERROR

5
Causeof Error
Cause: The unit detects a short circuit or open circuit of the
outdoor unit coil sensor during the inspection of the outdoor
unit control panel, indicated by “external coil sensor error”.
Inspection path: Sensor →Sensor wire →Connectors →
Main outdoor unit control panel
Tools Required Multimeter, 20KΩstandard sensor (25℃）
Possible Broken Part External coil sensor, outdoor unit control panel
Troubleshooting
Procedures
1. Check ifthere’s resistance problem, short circuit or open
circuit in the sensor; the resistance value should be
within a reasonable range (15KΩ under the temperature
of 25℃)
2. Check if the sensor wire is broken.
3. Check if the terminal connectors are well fixed; check if
the weld between the terminal and the main control panel
is loose and pull the terminal slightly for inspection if
necessary.
4. Check if the sensor is damp/wet.
5. If no standard sensor is available, replace the internal
temperature sensor, and then check if the error persists;
if yes, check the main internal control panel and replace
it.
Key Details DO NOT USE A SENSOR WITH A VALUE LOWER OR
HIGHER THAN 20KΩ
E2 –EXTERNAL COIL SENSOR ERROR

6
Causeof Error
Cause: The detection of short circuit or open circuit of
internal coil sensor during the inspection of main internal
control panel, indicated by “internal coil sensor error”.
Inspection path: Sensor →Sensor wire →Connectors →
Main internal control panel
Tools Required Multimeter, 20KΩstandard sensor (25℃）
Possible Broken Part External coil sensor, outdoor unit control panel
Troubleshooting
Procedures
1. Check if there’s resistance problem, short circuit or open
circuit in the sensor; the resistance value should be
within a reasonable range (15KΩ under the temperature
of 25℃)
2. Check if the sensor wire is broken.
3. Check if the terminal connectors are well fixed; check if
the weld between the terminal and the main control
panel is loose and pull the terminal slightly for
inspection if necessary.
4. Check if the sensor is damp/wet.
5. If no standard sensor is available, replace the internal
temperature sensor, and then check if the error persists;
if yes, check the main internal control panel and replace
it.
Key Details DO NOT USE A SENSOR WITH A VALUE LOWER OR
HIGHER THAN 20KΩ
E3 –INTERNAL COIL SENSOR ERROR

7
Causeof Error
Cause: The PG motor is equipped with a speed feedback signal
line. When the feedback signal is not received by the control
panel, it has no way to recognize the fan moving. This will be
indicated as “Internalfanerror”.
Tools Required Multimeter, A PG motor
Possible Broken Part Mechanical error, PG motor, control panel
Troubleshooting
Procedures
1. Check if the fan can work for 1 minute by itself before the
error occurs. If yes, there is no mechanical error.
2. Disconnect the power supply and move the fan blade by
hand to see if there’sany resistance.
3. Reconnect the drive wire and speed feedback wire to
exclude anyfanerrordue to connector loosening.
4. Check if the plug-in terminal of speed feedback on the
control panel is loose and pull the terminal slightly for
inspection if necessary.
5. Replace the motor in the faulted air conditioner with
other PG motor (do not fix it with the fan for the time
being), if the main control panel still indicates “internal
fan error”, then replace the main internal control panel; if
the error disappears, replace the internal fan.
E4 –INTERNAL FAN ERROR (INDOOR PG MOTOR)

8
Causeof Error
Cause: The frequency converter needs internal and external
communication. When the communication cannot be reached,
the internal and external units will indicate “internal and
external communication error”. Only “main internal control
panel, connecting cable and outdoor unit control panel” are
related to communication; but sometimes the communication
error will be indicated when the external unit has no power
and the internal unit cannot connect with the external unit
due to other errors, then such situation should be
distinguished from “pure communication error” and treated in
a different way.
Inspection paths:
1. Unit powers on and works: Are the internal unit and
external unit matched? → Is the phase sequence of
connecting wires of internal and external units correct?
2. Unit does not power on: Can AC 220V be delivered to the
terminal block of the external unit? → Can the bridge
rectifier and module panel generate DC 310V? →Can the
outdoor unit control panel generate a low voltage power
supply of DC 5V? → Does the main external control panel
show the status of periodical reset?
Tools Required Multimeter, main internal control panel in normal condition
Possible Broken Part Connecting wire phase sequence and contact, main internal
control panel, outdoor unit control panel, module panel
Troubleshooting
Procedures
1. Check if theIDUandtheODUare connected properly.
2. Check the outdoor unit control panel, turn on the unit,
three lights should be lit up, they will then turn off and
the relay will pull in. If this does not occur, there is a power
supply problem.
3. Connect the black signal line S to terminal N of ODU.
Turn on the A/C, if "E5" is still reported, the outdoor unit
control panel needs to be replaced.
E5 –INTERNAL & EXTERNAL COMMUNICATION ERROR

9
Causeof Error
Cause: The main control panel will indicate “external DC fan
error” when it detects an imbalanced current on the three lead
wires of the drive motor.
Inspection path: Is the DC fan stuck due to foreign material?
→Motor terminal connectors →Outdoor unit control panel →
Motor
Tools Required Outdoor unit control panel in normal condition
Possible Broken Part Mechanical jam of external fan, outdoor unit control panel,
external DC motor
Troubleshooting
Procedures
1. Exclude the possibility of a mechanical jam in the fan
motors.
2. Observe if the terminal of the fan is not connected
firmly or the order of the lead wires is correct. If the
external fan of the newly installed unit rotates
reversely, first observe if the color order of the three
lead wires is correct or change the order of any two of
the three lead wires of the motor to see if the fan can
rotate in the correct direction.
Key Details The fan blades may shake for 3-5 seconds and then rotate
slowly when powered on, this is normal.
F0 –EXTERNAL DC FAN ERROR

10
Causeof Error
Cause: The power module is the part to directly drive the
compressor to work. It can protect the machine in time when
overcurrent, overvoltage or overheat occurs and stops the
compressor from working. It will, at the same time, send a
“shutdown request” to the module panel. The error triggered by
the “shutdown request” is called “module protection error”.
Inspection path: Supply voltage → Compressor wire, reactor
wire →System blocked →Module panel damaged →Outdoor
unit control panel destroyed →Compressor destroyed
Tools Required Multimeter, pressure gauge, megameter, module panel
in normal condition
Possible Broken Part Supply voltage, compressor wire, reactor, system pressure,
module panel, outdoor unit control panel, compressor
Troubleshooting
Procedures
1. Check if the supply voltage unstable or volatile. High
system pressure will cause rotation problems to the
compressor.
2. Is the module panel fixed to the radiator firmly? Is the
internal and external heat exchanger dirty? If “module
protection error” is indicated immediately after starting up,
observe if there is any component destroyed by a strike arc
near the module panel; use the multimeter to test if the
resistances between any two compressor wires are the
same. Use the megameter to measure if the resistance
insulation of the three compressor wires against the
ground wire is good (normally at MΩlevel).
3. Test if the 15V and 5V (3.3V) power supply on the module
panel is stable and exclude the module panel error caused
by power supply of the outdoor unit control panel.
4. Replace with the module panel. If the test is normal after
changing the module panel, then the original module panel
is destroyed.
5. If there is only electromagnetic sound and the compressor
does not work; or an irregular sound appears after the
compressor works for a while and then it shuts down; the
compressor may be blocked or destroyed. Consider
replacing the compressor.
F1 –MODULE PROTECTION ERROR