82
P20
High pressure protection operation
When an abnormal stop occurs due to
the high pressure release control.
When the high pressure sensor (PD)
detects 4.05 MPa.
O
×
1. Check that the service valve is fully
open.
2. Defect of the pulse motor valve.
3. Check the outdoor fan system
(including clogging).
4. Over-filling of refrigerant.
5. Check the value of the high pressure
sensor (PD).
6. The water piping is too short.
Install a buffer tank, or set the setting
temperature lower.
10
108
P22
Outdoor fan system error
When a DC fan rotor position detection
NG, element short circuit, loss of
synchronization, or abnormal motor
current occurs.
O
×
1. Check the lock status of the motor
fan.
2. Check the connection of the fan
motor cable connector.
3. Check the power supply voltage.
(AC220~230 V±10%)
8
109
P26
Short circuit of the compressor driver
element error
When an abnormal short circuit of IGBT
is detected.
O
×
1. P26 abnormality occurs when
operating with the compressor
wiring disconnected … Check the
control board.
2. No abnormality occurs when
operating with the compressor
wiring disconnected … Compressor
rare short.
8
109
P29
Compressor rotor position error
The rotor position in the compressor
cannot be detected.
O
×
1. Even if the connection lead wire of
the compressor is disconnected, it
stops due to an abnormality in the
position detection … Replace the
inverter control board.
2. Check the wire wound resistor of the
compressor. Short circuit
… Replace the compressor.
8
109
Check
code
Diagnostic functional operation
Determination and action
Number of
abnormalities
for
confirmation
Detailed
item
Operational cause
Backup
operation
Automatic
reset
AMP Air Conditioning
www.ampair.co.uk | [email protected]
