YASKAWA Z1000U Series Quick Start Manual page 67

HOA Keypad Display
doH
EF
EF0
EF1
EF2
EF3
EF4
EF5
EF6
EF7
EF8
FbH
FbL
Fdv
HCA
LT-1
LT-2
LT-3
oH
oH2
oH3
YASKAWA ELECTRIC TOEP C710636 11E Z1000U HVAC MATRIX Drive Quick Start Guide
Damping Resistor Overheat
The temperature of the built-in damping resistor exceeded the set value.
Forward/Reverse Run Command Input Error
Both forward run and reverse run closed simultaneously for longer than 0.5 s.
Option Card External Fault
An external fault condition is present.
External Fault (input terminal S1)
External fault at multi-function input terminal S1.
External Fault (input terminal S2)
External fault at multi-function input terminal S2.
External Fault (input terminal S3)
External fault at multi-function input terminal S3.
External Fault (input terminal S4)
External fault at multi-function input terminal S4.
External Fault (input terminal S5)
External fault at multi-function input terminal S5.
External Fault (input terminal S6)
External fault at multi-function input terminal S6.
External Fault (input terminal S7)
External fault at multi-function input terminal S7.
External Fault (input terminal S8)
External fault at multi-function input terminal S8.
Excessive PID Feedback
PID feedback input is greater than the level set to b5-36 for longer than the time set to b5-37. Set b5-12 to 2 or 5 to enable
fault detection.
PID Feedback Loss
PID feedback loss detection is programmed to trigger a fault (b5-12 = 2 or 5) and the PID feedback level is below the
detection level set to b5-13 for longer than the time set to b5-14.
Power Supply Frequency Fault
The input power supply frequency exceeded the allowable frequency fluctuation.
Current Alarm
Drive current exceeded overcurrent warning level (150% of the rated current).
Cooling Fan Maintenance Time
The cooling fan has reached its expected maintenance period and may need to be replaced.
Note: An alarm output (H2-oo = 10) will only be triggered if both (H2-oo = 2F and
H2-oo = 10) are set.
Capacitor Maintenance Time
The main circuit and control circuit capacitors are nearing the end of their expected performance life.
Note: An alarm output (H2-oo = 10) will only be triggered if H2-oo = 2F.
Soft Charge Bypass Relay Maintenance Time
The DC bus soft charge relay is nearing the end of its expected performance life.
Note: An alarm output (H2-oo = 10) will only be triggered if H2-oo = 2F.
Heatsink Overheat
The heatsink temperature exceeded the overheat pre-alarm level set to L8-02. The default value for L8-02 is determined
by drive model selection (o2-04).
Heatsink Overheat Warning
"Heatsink Overheat Warning" was input to a multi-function input terminal, S1 through S8 (H1-oo= B).
Motor Overheat Alarm (PTC Input)
• The motor overheat signal to analog input terminal A1, A2, or A3 exceeded the alarm detection level.
• Detection requires setting multi-function analog inputs H3-02, H3-10, or H3-06 to E.
Alarm Name
i.6 Troubleshooting
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