Pioneer QUANTUM INVERTER Series Service & Troubleshooting Manual page 113

For some models
Operation Timer
Lamp Lamp
1 time OFF
2 times OFF
3 times OFF
4 times OFF
5 times OFF
5 times OFF
5 times OFF
5 times OFF
5 times OFF
6 times OFF
6 times OFF
12 times OFF
9 times OFF
8 times OFF
7 times FLASH
2 times FLASH
3 times FLASH
5 times FLASH
1 time FLASH
7 times FLASH
1 times ON
LED
Error Information
Display
EH 00/
Indoor unit EEPROM parameter error
EH 0A
Indoor / outdoor unit communication error
EL 01
Zero-crossing signal detection error(for some models)
EL 02
The indoor fan speed is operating outside of the normal range
EL 03
Outdoor unit EEPROM parameter error(for some models)
Ec 51
Condenser coil temperature sensor T3 is in open circuit or has
Ec 52
short circuited
Outdoor room temperature sensor T4 is in open circuit or has short
Ec 53
circuited
Compressor discharge temperature sensor TP is in open circuit
Ec 54
or has short circuited
Evaporator coil outlet temperature sensor T2B is in open circuit
Ec 56
or has short circuited(for free-match indoor units)
Indoor room temperature sensor T1 is in open circuit or has short
Eh 60
circuited
Evaporator coil temperature sensor T2 is in open circuit or has
Eh 61
short circuited
The outdoor fan speed is operating outside of the normal range
Ec 07
(for some models)
Indoor PCB / Display board communication error (for some models)
Eh 0b
Refrigerant leak detected
El 0c
IPM malfunction or IGBT over-strong current protection
PC 00
Over voltage or over low voltage protection
PC 01
High temperature protection of IPM module or High pressure
PC 02
protection
Inverter compressor drive error
PC 04
Current overload protection(for some models)
PC 08
High pressure protection or low pressure protection
PC 03
(for some models)
Indoor units mode conflict (match with multi outdoor unit)
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Troubleshooting
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5

Solution
TS19
TS20
TS22
TS23
TS19
TS26
TS26
TS26
TS26
TS26
TS26
TS23
TS27
TS28
TS30
TS31
TS32
TS34
TS29
TS35
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