Airedale EasiCool 6kW 64kW - Manual (Page 24)

24 EasiCool EZRE Operational Manual 7610207 V1.0.0_02_2013
Tr
ou
ble
sh
oo
tin
g
EasiCool™ EZRE Precision Air Conditioning
Troubleshooting
Suction Throttle Valve (STV) (Optional Extra)
FAULT POSSIBLE CAUSE REMEDY / ACTION
Suction pressure too low. Suction throttle valve fully shut.
Check valve opens fully at 100% cooling
demand. Inspect, clean or replace.
High discharge temperature.
Suction throttle valve in operation.
Check suction throttle valve
operation. Inspect, clean or replace.
Open suction throttle valve to
reduce discharge temperature.
Large or complete loss of
refrigerant charge.
Investigate for refrigerant leaks,
repair and re-charge system.
High compressor superheat.
Suction throttle valve shut.
Check suction throttle valve operation.
Inspect, clean or replace.
Large or complete loss of
refrigerant charge.
Investigate for refrigerant leaks,
repair and re-charge system.
Cooling output insufficient. Suction throttle valve in operation.
Check supply air setpoint and
unit cooling demand.
Hot Gas Re-Heat (HGRH) (Optional Extra)
FAULT POSSIBLE CAUSE REMEDY / ACTION
Cooling output insufficient. Hot gas re-heat coil in operation.
Check cooling demand and ensure
hot gas re-heat valve is closed.
Check hot gas re-heat valve operation.
Inspect, clean or replace.
Re-heat output insufficient. Faulty hot gas re-heat valve.
Check hot has re-heat valve operation.
Inspect, clean or replace.
Humidifier (Optional Extra)
FAULT POSSIBLE CAUSE REMEDY / ACTION
Main fuses / MCB trips when
initially switched on.
Cylinder damage (shorted electrode(s). Test with Megger - Replace cylinder.
Humidifier ‘called for’ but not filling. Water not available at cylinder.
Check all mains cold water valves.
Check any strainers fitted.
Check inlet solenoid valve (yellow)
strainer - clean as necessary.
Inlet water solenoid not operating
- check for feed. Replace solenoid
/ control board as necessary.
Mains water pressure over 8 Bar
- fit pressure reducing device.
The humidifier loads with water
but does not produce steam.
Too high steam delivery back pressures.
Check steam delivery pipe is
not blocked with debris.
Cylinder inlet filter clogged. Clean the filter.
Limescale inside the supply tank. Clean the supply tank.
Drain solenoid valve faulty.
Check 24 Vac anomalous presence
on the drain solenoid valve and/or
replacement of drain solenoid valve.
The humidifier wets the underlying floor.
Supply or overflow hydraulic circuit leaking. Check the entire hydraulic circuit.
Steam delivery pipe not properly
fastened to the cylinder.
Check fastening of the clamp
on the steam delivery pipe.
Cylinder operating - Low
Current / Low output.
Humidifier in start-up phase.
Wait for impurity concentration to build
up through natural drain cycle. This will
allow an increase in passed current.
Cylinder nearing end of useful life. Strip and clean or replace.