Zehnder EASY 5.0
35
Id
Description
Class
Time
limit
Action
Value/thres-
hold
Details/explanations
Possible causes
138 Output in
manual mode
C
1s
At least one output is in manual
mode. This alarm works in
conjunction with alarms 113/115/
116/117/118/119/125/126/140.
This also indicates that the
heating and/or cooling outputs
have been switched to manual
mode.
140
Fresh air
preheating coil
in manual mode
C
1s
The fresh air preheating coil is
under manual control.
145
Outside air
temperature
sensor fault
A
5s
Normal
stop*
Faulty temperature sensor and/or
wiring (open or short circuit)
146
Supply air
temperature
sensor fault
A
5s
Normal
stop*
147
Exhaust air
temperature
sensor fault
(bypass)
A
5s
Normal
stop*
Only if plate heat exchanger
For the anti-icing function of
the plate heat exchanger via
bypass
148
Return air
temperature
sensor fault
A
5s
Normal
stop*
165
Supply
pressure
transducer
fault
A
5s
Normal
stop*
Only for LOBBY
Faulty/missing transducer and/or
faulty wiring (open or short
circuit)
166
Return
pressure
transducer
fault
A
5s
Normal
stop*
Only for LOBBY
Faulty/missing transducer and/or
faulty wiring (open or short
circuit)
167
Supply air
volume
transducer
fault
A
5s
Normal
stop*
MAC2 / QUATTRO only
Faulty/missing transducer and/or
faulty wiring (open or short
circuit)
168
Return air
volume
transducer
fault
A
5s
Normal
stop*
MAC2 / QUATTRO only
Faulty/missing transducer and/or
faulty wiring (open or short
circuit)
175
CO2
transducer
fault
A
5s
Normal
stop*
DIVA and QUATTRO only
Faulty/missing transducer and/or
faulty wiring (open or short
circuit)
179
Fresh air
preheating
temperature
sensor fault
A
5s
Normal
stop*
Plate heat exchanger units
only
Faulty/missing temperature
sensor and/or wiring (open or
short-circuited) when the unit is
equipped with a fresh air
preheating coil (INFINITE).
Faulty or missing 1000 Ohm
resistor at the controller
terminals when the unit is not
equipped with a fresh air
preheating coil.
192
Communication
fault with the
slave controller
C
120s
Incorrectly configured master or
slave controller, missing or faulty
wire connection between the two
controllers, faulty/non-functional
slave controller.
Z-MASTER-V1122-CSY-INM-Zehnder Easy5.0