Viessmann VITOTRONIC 200 Service Instructions Manual page 131

Ventilation
(cont.)
Display Meaning
"Fan blocking time,
■
frost prot:"
■
If 2 time periods are displayed:
■
■
Note
If both time periods are shown, both the outdoor air and supply
air temperature are too low. The fans are only switched off and
back on again when both time periods have expired.
"Status PHR HLSC:" "PHR
blocked"
"Time until adjust-
■
ment:"
■
See chapter "Frost protection Vitovent 300-F".
■
■
"Blocking time for Remaining time period until the next defrost process of the heat
defrosting:" exchanger may start.
"Defrost time:" Remaining duration of the currently active defrost function
"Detection, frost Icing up of heat exchanger was recognised due to excessive
pr.max.speed:" fan speed: Remaining time until defrost function becomes ac-
tive.
If one or both fans have been switched off for frost protection:
Remaining duration until the fans are started again
If the frost protection function of the ventilation unit is active
and the fans are switched on:
Min. duration after which the fans can be stopped for frost
protection.
Left hand time period:
Frost protection function was switched on due to the outdoor
air temperature being too low.
Right hand time period:
Frost protection function was switched on due to the supply
air temperature being too low.
High limit safety cut-out of the electric preheat-
ing coil (accessories) has responded. The
electric preheating coil can only be restarted
after the high limit safety cut-out has been re-
set with the "Reset" button on the preheating
coil.
Note
Remedy the cause of the fault before resetting
the high limit safety cut-out: See
"Vitovent 200-C" or "Vitovent 300-F" installa-
tion and service instructions.
Frost protection without electric preheating coil:
Remaining time until the ventilation unit is switched back on in
"Standard operation".
Frost protection with electric preheating coil:
Remaining time until adjustment of the ventilation level
If "Intensive operation" was switched on externally:
Remaining time until "Intensive operation" ends automati-
cally ("Duration, bathroom vent. 7D3B").
If the electric preheating coil is switched on:
Remaining run-on time of fans, to prevent overheating of the
electric preheating coil.
Diagnosis
Vitovent
200-C 300-F 200-W
300-C
300-W
X X
—
X
— —
X X
—
X
— —
X
— —
X
— —
X
— —
X
— —
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