47
PROBLEM
OPERATING MODE
PROBABLE CAUSE
REMEDY
COOLING
HEATING
A)
Unit does not start
⊗
⊗
Faulty connection or open
contacts.
Check voltage, close contacts.
⊗
⊗
No external permissive
Check water circulation pump
operation, flow switches.
Bleed circuit.
Check
other
external
permissives.
⊗
⊗
Anti-recirculation timer
Wait 5 minutes
⊗
⊗
No service thermostat
permissive
System at operating
temperature, no thermostat
trip.
Check thermostat operation
and set point.
⊗
⊗
No antifreeze thermostat
permissive.
Check thermostat operation
and set point.
⊗
⊗
Fan thermal switch tripped. See point F
⊗
⊗
No permissive from a safety
device.
See points D-E
⊗
⊗
Faulty compressor.
See point B
⊗
⊗
No flow switch permissive. Low water flow rate. Check
water recirculation pumps and
gate valves.
⊗
⊗
Power phase relay tripped.
Disconnect power supply and
invert two phases of the power
cable.
Содержание KAPPA V 2001
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