Nibe ACVM 270, Installation And Maintenance Instructions Manual

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May be due to Description Alarm text on the dis-
play Alarm
no.
- Open-circuit or short-circuit on sensor input Sensor fault, outdoor temperature sensor in
AMS 10 (Tho-A). Sensor 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). Sensor 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 switch (63H1) deployed 5
times within 60 minutes or for 60 minutes con-
tinuously. HP alarm E40
- Open circuit or short circuit on input for high
pressure switch (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)
Could occur when 15V power supply to the in-
verter 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 paramet-
ers 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 in-
verter 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) tripped
- Open circuit or short circuit on input for low
pressure transmitter
Too low value on the low pressure sensor 3
times within 60 minutes. LP alarm E49
- Defective low pressure transmitter
- Defective control board in AMS 10
- Open circuit or short circuit on input for suc-
tion gas sensor (Tho-S)
- Faulty suction gas sensor (Tho-S)
- Defective fan motor
Continuous deviation on power transistor for
15 minutes. Inverter error E51
- Defective circuit board for inverter in AMS 10
63 NIBE™ SPLIT ACVM 270
Miscellaneous
Alarm list