mundoclima Aerotherm V17 Series, Руководство по обслуживанию

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P
art 4 - Diagnosis and T
roubleshoo
ting
Table 4-4.2: Errors indicated on LED1/2
LED1/2 flashing pattern Corresponding error
Flashes 8 times and stops for 1 second, then repeats L0 - Inverter module protection
Flashes 9 times and stops for 1 second, then repeats L1 - DC bus low voltage protection
Flashes 10 times and stops for 1 second, then repeats L2 - DC bus high voltage protection
Flashes 12 times and stops for 1 second, then repeats L4 - MCE error
Flashes 13 times and stops for 1 second, then repeats L5 - Zero speed protection
Flashes 15 times and stops for 1 second, then repeats L7 - Phase sequence error
Flashes 16 times and stops for 1 second, then repeats
L8 - Compressor frequency variation greater than
15Hz within one second protection
Flashes 17 times and stops for 1 second, then repeats
L9 - Actual compressor frequency differs from
target frequency by more than 15Hz protection
Principle of DC inverter 4.19.5
① 220V AC power supply change to DC power supply after bridge rectifier.
② Contactor is open, the current across the PTC to charge capacitor, after 5 seconds the contactor closed.
③The capacitor output steady power supply for inverter module P N terminals. In standby the voltage between P and N
terminal on inverter module is 310V DC. When the fan motor is running, the voltage between P and N terminal on
inverter module is 380V DC.
L0/L4 troubleshooting 4.19.6
Situation 1: L0 or L4 error appears immediately after the outdoor unit is powered-on
L0 / L4
Inverter module is damaged
1
Yes
Replace the inverter module
2
Notes:
1. Measure the resistance between each of U, V and W and each of P and N on the inverter module. All the resistances should be infinite. If any of them are
not infinite, the inverter module is damaged and should be replaced. Refer to
Figure 4-2.3 or 4-2.5 in Part 4, 2.1 “Outdoor Unit PCBs”.
2. When replacing an inverter module, a layer of thermally conductive silica gel should be painted on the PFC and IPM modules (on the reverse side of the
inverter module PCB). Refer to Figure 4-4.1.
Power
supply
(220V AC)
L
N
Bridge
rectifier
PTC
Contactor
Inductor
Capacitor
Inverter
module
U
V
W
Compressor
P
N
PFC
ƻ
3
ƻ
1
ƻ
2
MUNDOCLIMA AEROTHERM V17 - BIBLOC