Ca Protectn Device Primry - Viessmann VITOTRONIC 200 Service Instructions Manual

Message overview
(cont.)
Cause

CA Protectn device primry

Compressor stops.
Cause
: Primary circuit pressure switch or frost stat has re-
■
sponded.
: Faulty power supply to fan
■
: Fan blocked or faulty
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Contact humidistat has responded.
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Measure
Have the heat pump checked by a refrigeration engi-
■
neer.
Check fan or primary pump.
■
Check safety high pressure switch.
Vitocal 100-S/111-S:
■
The switching signal of the safety high pressure
switch can be tested at connection "H_Press" on the
main PCB of the outdoor unit: See "Main PCB [7] /
[7-1]".
0 V High pressure switch has responded.
230 V~ High pressure switch has not responded.
Vitocal 200-A/200-S/222-A/222-S/333-G:
■
The continuity of the safety high pressure switch can
be tested at the inverter.
Vitocal 200-A, type AWCI-AC 201.A, Vitocal 222-G,
■
Vitocal 300-A, type AWO-AC 301.B:
The switching signal of the safety high pressure
switch can be checked at terminal 215.4: See "Main
PCB".
0 V High pressure switch has responded.
230 V~ High pressure switch has not responded.
Vitocal 300-A, type AWO 302.B:
■
Connections XF4.1/XF4.2: See separate wiring dia-
gram.
Note
After removing the fault, switch the heat pump first off
and then on again.
Measure
Check safety equipment at terminals X3.8 and X3.9:
■
See "cross connect PCB"/"luster terminals". In sys-
tems without safety equipment or if the 24 V contact
humidistat is used at F11, check jumper between
X3.9/X3.8.
If the following contact humidistats are used for cool-
■
ing, check jumper at plug F11:
– Contact humidistat 230 V~, connection to X3.8/X3.9
–
24 V contact humidistat, connection to NC-Box
: Check primary circuit. Check primary pump and/or
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well pump. Replace the pump if required.
: Check electrical connections at the fan. Carry out
■
mechanical check of fan.
The switching signal can be tested at terminal 215.3:
See "Main PCB".
0 V Fault
230 V~ No fault
Troubleshooting
97