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Mess.
HA
Cabinet high temperature alarm
LA
Cabinet low temperature alarm
n
forbidden ,display screen show
P
the evaporator's temperature
Er
Hot key program failure
1) When the temperature sensor is fault , it is display P1 or P2, it will recover when the problem is
solved.
2) Cabinet over temperature alarm :
When the cabinet temperature is beyond the (AU) set point , Ad and (dA) all finished , it will display
HA, when the temperature is lower than the (AU) , the alarm will stop.
When the cabinet temperature is below the( AL) set point , Ad and (dA) all finished , it will display LA,
when the temperature is higher than the (AL) , the alarm will stop.
9.Hot key
1) Upload
① Program one controller with the front keypad.
② Insert the "Hot key" and push ▲key; the "uP" message appears.
③ Turn OFF the instrument remove the "Hot Key", then turn the controller ON again.
2) Download
① Insert the "Hot key", push the ▼key, the controller will display "do".
② Turn OFF the instrument remove the "Hot Key", then turn he controller ON again.
NOTE: The "Er" message is displayed for failed programming.
In this case push again o key if you want to restart the upload again or remove the "Hot key" to abort the
operation.
★ Pelase make sure that the power is stable during this time.
10.Wiring diagram
Cause
Evaporator sensor is
and "Md"
Outputs unchanged
Outputs unchanged
Outputs
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