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8-7. OUTDOOR UNIT OPERATION MONITOR FUNCTION
Operation indicator SW2: Indicator change of self diagnosis
SW2 setting
ON
1
2 3 4 5 6
<Digital indicator LED3 working details>
(Be sure that the 1 to 6 in the SW2 are set to OFF.)
(1) Display when the power supply is ON.
When the power supply is ON, blinking displays by turns.
Wait for 10 seconds at the longest.
(2) When the display lights (Normal operation)
1 Operation mode display
LED3
The tens digit : Operation mode
Display
Operation Model
O
OFF
C
COOLING
H
HEATING
d
DEFROSTING
2 Display during error postponement
Postponement code is displayed when
compressor stops due to the work of
protection device.
Postponement code is displayed while
error is being postponed.
(3) When the display blinks
Check code is displayed when compressor stops due to the work of protection devices.
Display
Inspection unit
0
Outdoor unit
Display
F5
63H connector(yellow) is open.
E8
Interface unit/Flow temp. controller-outdoor communication error (Signal receiving error) (Outdoor unit)
E9
Interface unit/Flow temp. controller-outdoor communication error (Transmitting error) (Outdoor unit)
EA
Miswiring of Interface unit/Flow temp. controller-outdoor unit connecting wire, excessive number of indoor units (2 units or more)
Eb
Miswiring of Interface unit/Flow temp. controller-outdoor unit connecting wire (converse wiring or disconnection)
EC
Startup time over
E0–E7 Communication error except for outdoor unit
OCH605A
Display detail
(Lighting)
The ones digit : Relay output
Display
0
1
2
3
4
5
6
7
8
A
Display
U1
Abnormal high pressure (63H operated)
U2
Abnormal high discharge temperature, shortage of refrigerant
U3
Open/short circuit of discharging thermistor (TH4 and TH34)
U4
Open/short of outdoor unit thermistors (TH3, TH32, TH6, TH7 and TH8 )
U5
Abnormal temperature of heat sink
U6
Abnormality of power module
U7
Abnormality of superheat due to low discharge temperature
U8
Abnormality in outdoor fan motor
U9
Voltage fault, Input current sensor error
Ud
Overheat protection
UF
Compressor overcurrent interruption (When Compressor locked)
UH
Current sensor error
UP
Compressor overcurrent interruption
P6
Abnormality of Interface or FTC units
P8
Abnormality of pipe temperature
UE
Abnormality pressure of pressure sensor
PE
Abnormality of inlet water temperature
Ed
Serial communication error
Contents to be inspected (When power is turned on)
31
The black square (
Explanation for display
1 second
interval
ON
1
Warming-up
Compressor
Compressor
—
—
—
—
—
—
—
—
—
ON
—
ON
—
ON
—
ON
ON
—
ON
—
Contents to be inspected (During operation)
■
) indicates a switch position.
SW2
(Initial setting)
2 3 4 5 6
4-way valve
Solenoid valve
—
—
—
ON
ON
—
ON
ON
—
—
—
ON
ON
—
ON
ON
—
—
ON
—
Unit
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