The following alarm blocks both AMS 10 and addition.
May be due to Description
Alarm text on the dis- play
Alarm no.
- The temperature limiter has tripped during transportation
Temperature limiter in ? has tripped. TB alarm
3
- High temperature in ? - Blown circuit fuse (L2)
HBS 12 alarm
May be due to Description
Alarm text on the dis- play
Alarm no.
- Low flow in heating operation Too high temperature out from the condenser.
High KF 6
- Too high set temperatures Occurs if alarm 71 occurs 3 times within an hour.
- Low flow during defrost Anti-freeze of heat exchanger.
Anti freeze HX 7
- Abnormally low temperature in the climate system
Occurs if alarm 72 occurs 3 times within an hour.
- Low flow during defrost Occurs if the alarm 77 occurs 10 times in succes-
sion. Defrosting interrupted 14
- Abnormally low temperature in the climate system
- Lack of refrigerant or leak
- Indoor unit and outdoor unit not compatible with each other.
Indoor unit and outdoor unit do not communic- ate with each other.
OU not compatible 15
- Low flow during defrost Occurs if the alarm 78 occurs 10 times in succes-
sion. Defrosting interrupted 16
- Open-circuit or short-circuit on sensor input Sensor fault, high pressure (BP4).
S. fault HP 31
- Sensor does not work
- Open-circuit or short-circuit on sensor input Sensor fault, cond out (BT12).
Sensor fault KF 32
- Sensor does not work (see "Temperature sensor" section)
- Open-circuit or short-circuit on sensor input Sensor fault, liquid line (BT15).
S. fault Liquid line 33
- Sensor does not work (see "Temperature sensor" section)
AMS 10 alarm
The following alarms block AMS 10. Addition runs at min permitted supply temperature.
May be due to Description
Alarm text on the dis- play
Alarm no.
- Any isolator switches for AMS 10 off Communication between the outdoor unit and
HBS 12 is broken. There must be 22 volt direct current (DC) in the switch CNW2 on the control board (PWB1).
OU Com. error E5
- Incorrect cable routing
- Sensor does not work (see "Temperature sensor" section)
Temperature deviation on the hot gas sensor (Tho-R1/R2) five times within 60 minutes or un- der 60 minutes.
High HX temp E35
- Insufficient air circulation or blocked heat ex- changer
- Defective control board in AMS 10 - Too much refrigerant
- Sensor does not work (see "Temperature sensor" section)
Temperature deviation on the hot gas sensor (Tho-D) two times within 60 minutes or under 60 minutes.
Permanent Hotgas E36
- Insufficient air circulation or blocked heat ex- changer
- If the fault persists during cooling, there may be an insufficient amount of refrigerant. - Defective control board in AMS 10
- Open-circuit or short-circuit on sensor input Sensor fault, heat exchanger in AMS 10 (Tho-R).
S. fault Tho-R E37
- Sensor does not work (see "Temperature sensor" section)
May be due to Description
Alarm text on the dis- play
Alarm no.
- Open-circuit or short-circuit on sensor input Sensor fault, outdoor sensor in AMS 10 (Tho-A).
S. fault Tho-A E38
- Sensor does not work (see "Temperature sensor" section)
- Defective control board in AMS 10
- Open-circuit or short-circuit on sensor input Sensor fault, hot gas in AMS 10 (Tho-D).
S. fault Tho-D E39
- Sensor does not work (see "Temperature sensor" section)
- Defective control board in AMS 10
- Insufficient air circulation or blocked heat ex- changer
The high pressure pressostat (63H1) deployed 5 times within 60 minutes or under 60 minutes continuously.
HP alarm E40
- Open circuit or short circuit on input for high pressure pressostat (63H1)
- Defective high pressure pressostat - Expansion valve not correctly connected - Service valve closed
- Defective control board in AMS 10 - Low or no flow during heating operation - Defective circulation pump
- Defective fuse, F(4A)
Can occur when 15V power supply to the inverter PCB is unstable.
When IPM (Intelligent power module) displays FO-signal (Fault Output) five times during a 60- minute period.
Power transistor too hot E41
- Incoming power supply interference Voltage from the inverter outside the parameters
four times within 30 minutes. Inverter error
E42
- Service valve closed
- Insufficient amount of refrigerant - Compressor fault
- Defective circuit board for inverter in AMS 10 - Open-circuit in connection between boards Communication between circuit board for invert-
er and control board broken. Inverter error
E45
- Defective circuit board for inverter in AMS 10 - Defective control board in AMS 10
- Sudden power failure Overcurrent, Inverter A/F module
Inverter error E47
- The fan cannot rotate freely Deviations in the fan speed in AMS 10.
Fan alarm E48
- Defective control board in AMS 10 - Defective fan motor
- Control board in AMS 10 dirty - Fuse (F2) blown
- Open circuit or short circuit on input for low pressure transmitter
Too low value on the low pressure transmitter 3 times within 60 minutes.
LP alarm E49
- Defective low pressure transmitter - Defective control board in AMS 10
May be due to Description
Alarm text on the dis- play
Alarm no.
- Open-circuit or short-circuit on sensor input Sensor fault, suction gas in AMS 10 (Tho-S).
S. fault Tho-S E53
- Sensor does not work (see "Temperature sensor" section)
- Defective control board in AMS 10
- Open-circuit or short-circuit on sensor input Sensor fault, low pressure transmitter in AMS 10.
S. fault LPT E54
- Sensor does not work (see "Temperature sensor" section)
- Defective control board in AMS 10 - Fault in the refrigerant circuit - Service valve closed
Insufficient refrigerant is detected upon start-up in cooling mode.
Insufficient refrigerant E57
- Loose connection sensor (BT15, BT3) - Defective sensor (BT15, BT3) - Too little refrigerant
- Defective circuit board for inverter in AMS 10 Failed start for compressor
Inverter error E59
- Defective control board in AMS 10 - Compressor fault