FAULT
CODE
CODE DESCRIPTION
3
Enter Water Temperature Thermistor (EWT) Failure/Out of Range
4
Actual Refrigerant Temperature Thermistor BPHE (TR) Failure/Out of Range
5
Air Thermistor of GMC
6
Loss communication to NUI control
7
NUI control Room Thermistor
8
Unit Capacity Mismatch
9
Flow Switch error / Water Pump
10
EEProm Corrupt
11
Air temperature higher than Stop Heat
12
Air temperature lower than Stop Cool
13
Loss Communication to RS485 (system configuration type 6)
14
Loss of Signal From inverter board / High Temperature Release
(Thermostat on compressor: 120° ± 4° C)
15
Exit water Temperature Thermistor (LWT) Failure/Out of Range
17
Inverter Air Thermistor (TO) Failure/Out of Range
18
G-Tr inverter short circuit protection
20
Compressor position Detection Circuit error
21
Inverter Current Sensor error
22
Heat Exchanger Sensors (TE) / (TS) Failure/Out of Range
23
Discharge Temperature Sensor (TD) (TD > 100° ± 4° C)
24
Outdoor Fan motor error
26
Other inverter board error
27
Compressor Lock
28
Discharge Temperature error Failure/Out of Range
29
Compressor Breakdown
30
Other inverter board error
The error code can be identified from the
flashing LED on the Diagnostic Indicator using
the following table. In the case of more than
one error, the error with the highest priority
will be displayed until it is resolved. In the
case of an error the LED flashes a numbers
times equal to the error code at a frequency
of 1Hz and then remains off again for 6
seconds. If the error code has 2 digits, the
flashing is interrupted for 2 seconds between
the first and second digits.
EXAMPLE: error 23: 2 flashes of 1 second
each. Off for 2 seconds. 3 flashes of 1 second
each. Off for 6 seconds. The cycle repeats
until the LED turns off because the problem
is resolved or if an error with higher priority
occurs.
To reset the unit after an error has been
cleared turn off the mains supply for 10
seconds and turn on again.
TROUBLE SHOOTING
Page 9
AEROMAX PLUS AIR SOURCE HEAT PUMP PACKAGE
KINGSPAN HEAT PUMPS
SYSTEM TEST
The diagnostic indicator for the air source
heat pump will be located indoors in a visible
place. The green lights shows that the power
is on to the heat pump. The red alarm light
will flash in the event of a problem. If this
occurs count the number of flashes between
pauses and use the fault code table to
determine the fault.
